257402943 has 12 divisors (see below), whose sum is σ = 424919248. Its totient is φ = 147087360.

The previous prime is 257402941. The next prime is 257402947. The reversal of 257402943 is 349204752.

It is not a de Polignac number, because 257402943 - 2¹ = 257402941 is a prime.

It is a super-2 number, since 2×257402943² = 132512550130122498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257402898 and 257402907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257402941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2042818 + ... + 2042943.

Almost surely, 2^257402943 is an apocalyptic number.

257402943 is a deficient number, since it is larger than the sum of its proper divisors (167516305).

257402943 is a wasteful number, since it uses less digits than its factorization.

257402943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085774 (or 4085771 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 257402943 is about 16043.7820665827. The cubic root of 257402943 is about 636.1182214670.

The spelling of 257402943 in words is "two hundred fifty-seven million, four hundred two thousand, nine hundred forty-three".