257576545 has 8 divisors (see below), whose sum is σ = 309808296. Its totient is φ = 205583616.

The previous prime is 257576519. The next prime is 257576549. The reversal of 257576545 is 545675752.

It can be written as a sum of positive squares in 4 ways, for example, as 1032256 + 256544289 = 1016^2 + 16017^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 257576545 - 2¹⁷ = 257445473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257576495 and 257576504.

It is not an unprimeable number, because it can be changed into a prime (257576549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57322 + ... + 61651.

It is an arithmetic number, because the mean of its divisors is an integer number (38726037).

Almost surely, 2^257576545 is an apocalyptic number.

It is an amenable number.

257576545 is a deficient number, since it is larger than the sum of its proper divisors (52231751).

257576545 is a wasteful number, since it uses less digits than its factorization.

257576545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119411.

The product of its digits is 1470000, while the sum is 46.

The square root of 257576545 is about 16049.1914126538. The cubic root of 257576545 is about 636.2611964943.

It can be divided in two parts, 257576 and 545, that added together give a triangular number (258121 = T₇₁₈).

The spelling of 257576545 in words is "two hundred fifty-seven million, five hundred seventy-six thousand, five hundred forty-five".