257542043 has 4 divisors (see below), whose sum is σ = 280954968. Its totient is φ = 234129120.

The previous prime is 257542003. The next prime is 257542067. The reversal of 257542043 is 340245752.

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 257542043 - 2¹⁰ = 257541019 is a prime.

It is a super-2 number, since 2×257542043² = 132655807825227698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257542003) 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, 11706446 + ... + 11706467.

It is an arithmetic number, because the mean of its divisors is an integer number (70238742).

Almost surely, 2^257542043 is an apocalyptic number.

257542043 is a deficient number, since it is larger than the sum of its proper divisors (23412925).

257542043 is a wasteful number, since it uses less digits than its factorization.

257542043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23412924.

The product of its (nonzero) digits is 33600, while the sum is 32.

The square root of 257542043 is about 16048.1164938444. The cubic root of 257542043 is about 636.2327864748.

Adding to 257542043 its reverse (340245752), we get a palindrome (597787795).

The spelling of 257542043 in words is "two hundred fifty-seven million, five hundred forty-two thousand, forty-three".