257144489 has 8 divisors (see below), whose sum is σ = 294350208. Its totient is φ = 220056480.

The previous prime is 257144483. The next prime is 257144501. The reversal of 257144489 is 984441752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 257144489 - 2¹² = 257140393 is a prime.

It is a super-2 number, since 2×257144489² = 132246576446142242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257144483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24692 + ... + 33525.

It is an arithmetic number, because the mean of its divisors is an integer number (36793776).

Almost surely, 2^257144489 is an apocalyptic number.

It is an amenable number.

257144489 is a deficient number, since it is larger than the sum of its proper divisors (37205719).

257144489 is an equidigital number, since it uses as much as digits as its factorization.

257144489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58855.

The product of its digits is 322560, while the sum is 44.

The square root of 257144489 is about 16035.7253967508. The cubic root of 257144489 is about 635.9052449384.

It can be divided in two parts, 25714 and 4489, that added together give a palindrome (30203).

The spelling of 257144489 in words is "two hundred fifty-seven million, one hundred forty-four thousand, four hundred eighty-nine".