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245013 = 381671
BaseRepresentation
bin111011110100010101
3110110002120
4323310111
530320023
65130153
72040216
oct736425
9413076
10245013
1115809a
12b9959
13876a2
146540d
154c8e3
hex3bd15

245013 has 4 divisors (see below), whose sum is σ = 326688. Its totient is φ = 163340.

The previous prime is 244997. The next prime is 245023. The reversal of 245013 is 310542.

Adding to 245013 its reverse (310542), we get a palindrome (555555).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 245013 - 24 = 244997 is a prime.

It is a D-number.

245013 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 244983 and 245001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245023) 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 3 ways as a sum of consecutive naturals, for example, 40833 + ... + 40838.

It is an arithmetic number, because the mean of its divisors is an integer number (81672).

2245013 is an apocalyptic number.

It is an amenable number.

245013 is a deficient number, since it is larger than the sum of its proper divisors (81675).

245013 is an equidigital number, since it uses as much as digits as its factorization.

245013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81674.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 245013 is about 494.9878786395. The cubic root of 245013 is about 62.5743541749.

The spelling of 245013 in words is "two hundred forty-five thousand, thirteen".

Divisors: 1 3 81671 245013