257452045 has 4 divisors (see below), whose sum is σ = 308942460. Its totient is φ = 205961632.

The previous prime is 257452037. The next prime is 257452049. The reversal of 257452045 is 540254752.

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 80748196 + 176703849 = 8986^2 + 13293^2 .

It is a cyclic number.

It is not a de Polignac number, because 257452045 - 2³ = 257452037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257452045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257452049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25745200 + ... + 25745209.

It is an arithmetic number, because the mean of its divisors is an integer number (77235615).

Almost surely, 2^257452045 is an apocalyptic number.

It is an amenable number.

257452045 is a deficient number, since it is larger than the sum of its proper divisors (51490415).

257452045 is an equidigital number, since it uses as much as digits as its factorization.

257452045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51490414.

The product of its (nonzero) digits is 56000, while the sum is 34.

The square root of 257452045 is about 16045.3122437676. The cubic root of 257452045 is about 636.1586673799.

The spelling of 257452045 in words is "two hundred fifty-seven million, four hundred fifty-two thousand, forty-five".