257241497 has 4 divisors (see below), whose sum is σ = 258968100. Its totient is φ = 255514896.

The previous prime is 257241493. The next prime is 257241527. The reversal of 257241497 is 794142752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13756681 + 243484816 = 3709^2 + 15604^2 .

It is a cyclic number.

It is not a de Polignac number, because 257241497 - 2² = 257241493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257241493) 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, 863078 + ... + 863375.

It is an arithmetic number, because the mean of its divisors is an integer number (64742025).

Almost surely, 2^257241497 is an apocalyptic number.

It is an amenable number.

257241497 is a deficient number, since it is larger than the sum of its proper divisors (1726603).

257241497 is a wasteful number, since it uses less digits than its factorization.

257241497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726602.

The product of its digits is 141120, while the sum is 41.

The square root of 257241497 is about 16038.7498577663. The cubic root of 257241497 is about 635.9852001685.

The spelling of 257241497 in words is "two hundred fifty-seven million, two hundred forty-one thousand, four hundred ninety-seven".