1251090930 has 16 divisors (see below), whose sum is σ = 3002618304. Its totient is φ = 333624240.

The previous prime is 1251090881. The next prime is 1251090959. The reversal of 1251090930 is 390901521.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 41703031 = 1251090930 / (1 + 2 + 5 + 1 + 0 + 9 + 0 + 9 + 3 + 0).

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20851486 + ... + 20851545.

It is an arithmetic number, because the mean of its divisors is an integer number (187663644).

Almost surely, 2^1251090930 is an apocalyptic number.

1251090930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251090930 is an abundant number, since it is smaller than the sum of its proper divisors (1751527374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251090930 is a wasteful number, since it uses less digits than its factorization.

1251090930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41703041.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 1251090930 is about 35370.7637746204. The cubic root of 1251090930 is about 1077.5306322186.

The spelling of 1251090930 in words is "one billion, two hundred fifty-one million, ninety thousand, nine hundred thirty".