257343401 has 4 divisors (see below), whose sum is σ = 294106752. Its totient is φ = 220580052.

The previous prime is 257343397. The next prime is 257343451. The reversal of 257343401 is 104343752.

It is a happy number.

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 not a de Polignac number, because 257343401 - 2² = 257343397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257343451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18381665 + ... + 18381678.

It is an arithmetic number, because the mean of its divisors is an integer number (73526688).

Almost surely, 2^257343401 is an apocalyptic number.

It is an amenable number.

257343401 is a deficient number, since it is larger than the sum of its proper divisors (36763351).

257343401 is an equidigital number, since it uses as much as digits as its factorization.

257343401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36763350.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 257343401 is about 16041.9263494133. The cubic root of 257343401 is about 636.0691690986.

The spelling of 257343401 in words is "two hundred fifty-seven million, three hundred forty-three thousand, four hundred one".