250561945 has 8 divisors (see below), whose sum is σ = 301371336. Its totient is φ = 199984896.

The previous prime is 250561921. The next prime is 250561951. The reversal of 250561945 is 549165052.

It can be written as a sum of positive squares in 4 ways, for example, as 9815689 + 240746256 = 3133^2 + 15516^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250561945 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 55702 + ... + 60031.

It is an arithmetic number, because the mean of its divisors is an integer number (37671417).

Almost surely, 2^250561945 is an apocalyptic number.

It is an amenable number.

250561945 is a deficient number, since it is larger than the sum of its proper divisors (50809391).

250561945 is a wasteful number, since it uses less digits than its factorization.

250561945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116171.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 250561945 is about 15829.1485873372. The cubic root of 250561945 is about 630.4321759574.

The spelling of 250561945 in words is "two hundred fifty million, five hundred sixty-one thousand, nine hundred forty-five".