257144546 has 4 divisors (see below), whose sum is σ = 385716822. Its totient is φ = 128572272.

The previous prime is 257144543. The next prime is 257144557. The reversal of 257144546 is 645441752.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 192904321 + 64240225 = 13889^2 + 8015^2 .

It is a super-2 number, since 2×257144546² = 132246635075092232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257144543) 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 as a sum of consecutive naturals, namely, 64286135 + ... + 64286138.

Almost surely, 2^257144546 is an apocalyptic number.

257144546 is a deficient number, since it is larger than the sum of its proper divisors (128572276).

257144546 is a wasteful number, since it uses less digits than its factorization.

257144546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128572275.

The product of its digits is 134400, while the sum is 38.

The square root of 257144546 is about 16035.7271740324. The cubic root of 257144546 is about 635.9052919244.

The spelling of 257144546 in words is "two hundred fifty-seven million, one hundred forty-four thousand, five hundred forty-six".