1251066980 has 12 divisors (see below), whose sum is σ = 2627240700. Its totient is φ = 500426784.

The previous prime is 1251066953. The next prime is 1251067001. The reversal of 1251066980 is 896601521.

It can be written as a sum of positive squares in 2 ways, for example, as 810654784 + 440412196 = 28472^2 + 20986^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31276655 + ... + 31276694.

It is an arithmetic number, because the mean of its divisors is an integer number (218936725).

Almost surely, 2^1251066980 is an apocalyptic number.

1251066980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251066980 is an abundant number, since it is smaller than the sum of its proper divisors (1376173720).

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

1251066980 is a wasteful number, since it uses less digits than its factorization.

1251066980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62553358 (or 62553356 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 1251066980 is about 35370.4252165563. The cubic root of 1251066980 is about 1077.5237563466.

The spelling of 1251066980 in words is "one billion, two hundred fifty-one million, sixty-six thousand, nine hundred eighty".