253029645 has 24 divisors (see below), whose sum is σ = 478456992. Its totient is φ = 122680800.

The previous prime is 253029599. The next prime is 253029659. The reversal of 253029645 is 546920352.

253029645 is a `hidden beast` number, since 2 + 5 + 3 + 0 + 2 + 9 + 645 = 666.

It is not a de Polignac number, because 253029645 - 2⁸ = 253029389 is a prime.

It is a super-3 number, since 3×253029645³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255091 + ... + 256080.

It is an arithmetic number, because the mean of its divisors is an integer number (19935708).

Almost surely, 2^253029645 is an apocalyptic number.

It is an amenable number.

253029645 is a deficient number, since it is larger than the sum of its proper divisors (225427347).

253029645 is a wasteful number, since it uses less digits than its factorization.

253029645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511193 (or 511190 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 253029645 is about 15906.9055758812. The cubic root of 253029645 is about 632.4950563857.

Adding to 253029645 its reverse (546920352), we get a palindrome (799949997).

The spelling of 253029645 in words is "two hundred fifty-three million, twenty-nine thousand, six hundred forty-five".