1250020681 has 8 divisors (see below), whose sum is σ = 1538487104. Its totient is φ = 989027280.

The previous prime is 1250020679. The next prime is 1250020747. The reversal of 1250020681 is 1860200521.

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 1250020681 - 2¹ = 1250020679 is a prime.

It is a super-2 number, since 2×1250020681² = 3125103405855407522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1250020661) by changing a digit.

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, 6868155 + ... + 6868336.

It is an arithmetic number, because the mean of its divisors is an integer number (192310888).

Almost surely, 2^1250020681 is an apocalyptic number.

It is an amenable number.

1250020681 is a deficient number, since it is larger than the sum of its proper divisors (288466423).

1250020681 is a wasteful number, since it uses less digits than its factorization.

1250020681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13736511.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1250020681 is about 35355.6315316245. The cubic root of 1250020681 is about 1077.2232857650.

The spelling of 1250020681 in words is "one billion, two hundred fifty million, twenty thousand, six hundred eighty-one".