257429 has 4 divisors (see below), whose sum is σ = 259584. Its totient is φ = 255276.

The previous prime is 257407. The next prime is 257437. The reversal of 257429 is 924752.

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 a de Polignac number, because none of the positive numbers 2^k-257429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257459) 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, 887 + ... + 1140.

It is an arithmetic number, because the mean of its divisors is an integer number (64896).

2²⁵⁷⁴²⁹ is an apocalyptic number.

It is an amenable number.

257429 is a deficient number, since it is larger than the sum of its proper divisors (2155).

257429 is a wasteful number, since it uses less digits than its factorization.

257429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154.

The product of its digits is 5040, while the sum is 29.

The square root of 257429 is about 507.3746150528. The cubic root of 257429 is about 63.6139685574.

It can be divided in two parts, 257 and 429, that added together give a palindrome (686).

The spelling of 257429 in words is "two hundred fifty-seven thousand, four hundred twenty-nine".