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245025 = 3452112
BaseRepresentation
bin111011110100100001
3110110010000
4323310201
530320100
65130213
72040234
oct736441
9413100
10245025
11158100
12b9969
13876b1
146541b
154c900
hex3bd21

245025 has 45 divisors (see below), whose sum is σ = 498883. Its totient is φ = 118800.

The previous prime is 245023. The next prime is 245029. The reversal of 245025 is 520542.

Multipling 245025 by its product of nonzero digits (400), we get a square (98010000 = 99002).

Adding to 245025 its reverse (520542), we get a palindrome (765567).

245025 = T494 + T495.

245025 = 442 + 452 + ... + 932.

The square root of 245025 is 495.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 88209 + 156816 = 297^2 + 396^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 245025 - 21 = 245023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 244989 and 245007.

It is not an unprimeable number, because it can be changed into a prime (245023) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 22270 + ... + 22280.

2245025 is an apocalyptic number.

245025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

245025 is the 495-th square number.

245025 is the 248-th centered octagonal number.

It is an amenable number.

245025 is an abundant number, since it is smaller than the sum of its proper divisors (253858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245025 is a wasteful number, since it uses less digits than its factorization.

245025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44 (or 19 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The cubic root of 245025 is about 62.5753757261.

The spelling of 245025 in words is "two hundred forty-five thousand, twenty-five".