1250304561 has 12 divisors (see below), whose sum is σ = 1970177040. Its totient is φ = 757760280.

The previous prime is 1250304529. The next prime is 1250304563. The reversal of 1250304561 is 1654030521.

It is not a de Polignac number, because 1250304561 - 2⁵ = 1250304529 is a prime.

It is a super-2 number, since 2×1250304561² = 3126522990514805442, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1250304563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6314571 + ... + 6314768.

It is an arithmetic number, because the mean of its divisors is an integer number (164181420).

Almost surely, 2^1250304561 is an apocalyptic number.

1250304561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1250304561 is a deficient number, since it is larger than the sum of its proper divisors (719872479).

1250304561 is a wasteful number, since it uses less digits than its factorization.

1250304561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12629356 (or 12629353 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1250304561 is about 35359.6459399695. The cubic root of 1250304561 is about 1077.3048254826.

The spelling of 1250304561 in words is "one billion, two hundred fifty million, three hundred four thousand, five hundred sixty-one".