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BaseRepresentation
bin101011100101000111001
32200112212211
411130220321
5331144100
650335121
715065224
oct5345071
92615784
101428025
11895995
1258a4a1
133accb1
142925bb
151d31ba
hex15ca39

1428025 has 9 divisors (see below), whose sum is σ = 1778191. Its totient is φ = 1137640.

The previous prime is 1428013. The next prime is 1428029. The reversal of 1428025 is 5208241.

The square root of 1428025 is 1195.

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., 514089 + 913936 = 717^2 + 956^2 .

It is not a de Polignac number, because 1428025 - 27 = 1427897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1427987 and 1428005.

It is not an unprimeable number, because it can be changed into a prime (1428029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5856 + ... + 6094.

21428025 is an apocalyptic number.

1428025 is the 1195-th square number.

1428025 is the 598-th centered octagonal number.

It is an amenable number.

1428025 is a deficient number, since it is larger than the sum of its proper divisors (350166).

1428025 is an frugal number, since it uses more digits than its factorization.

1428025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The cubic root of 1428025 is about 112.6104265526.

The spelling of 1428025 in words is "one million, four hundred twenty-eight thousand, twenty-five".

Divisors: 1 5 25 239 1195 5975 57121 285605 1428025