257412121 has 4 divisors (see below), whose sum is σ = 257461632. Its totient is φ = 257362612.

The previous prime is 257412059. The next prime is 257412143. The reversal of 257412121 is 121214752.

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 not a de Polignac number, because 257412121 - 2¹³ = 257403929 is a prime.

It is a super-2 number, since 2×257412121² = 132522000075437282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257419121) 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, 15901 + ... + 27706.

It is an arithmetic number, because the mean of its divisors is an integer number (64365408).

Almost surely, 2^257412121 is an apocalyptic number.

It is an amenable number.

257412121 is a deficient number, since it is larger than the sum of its proper divisors (49511).

257412121 is an equidigital number, since it uses as much as digits as its factorization.

257412121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49510.

The product of its digits is 1120, while the sum is 25.

The square root of 257412121 is about 16044.0680938470. The cubic root of 257412121 is about 636.1257818877.

Adding to 257412121 its reverse (121214752), we get a palindrome (378626873).

The spelling of 257412121 in words is "two hundred fifty-seven million, four hundred twelve thousand, one hundred twenty-one".