257429039 has 4 divisors (see below), whose sum is σ = 294204624. Its totient is φ = 220653456.

The previous prime is 257429021. The next prime is 257429047. The reversal of 257429039 is 930924752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257429039 - 2⁸ = 257428783 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257428987 and 257429005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257429539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18387782 + ... + 18387795.

It is an arithmetic number, because the mean of its divisors is an integer number (73551156).

Almost surely, 2^257429039 is an apocalyptic number.

257429039 is a deficient number, since it is larger than the sum of its proper divisors (36775585).

257429039 is an equidigital number, since it uses as much as digits as its factorization.

257429039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36775584.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 257429039 is about 16044.5953205433. The cubic root of 257429039 is about 636.1397176990.

It can be divided in two parts, 2574 and 29039, that added together give a palindrome (31613).

The spelling of 257429039 in words is "two hundred fifty-seven million, four hundred twenty-nine thousand, thirty-nine".