1252020771 has 12 divisors (see below), whose sum is σ = 1808990040. Its totient is φ = 834442560.

The previous prime is 1252020739. The next prime is 1252020779. The reversal of 1252020771 is 1770202521.

It is not a de Polignac number, because 1252020771 - 2⁵ = 1252020739 is a prime.

It is a super-2 number, since 2×1252020771² = 3135112022030868882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1252020779) 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, 17116 + ... + 52886.

It is an arithmetic number, because the mean of its divisors is an integer number (150749170).

Almost surely, 2^1252020771 is an apocalyptic number.

1252020771 is a deficient number, since it is larger than the sum of its proper divisors (556969269).

1252020771 is a wasteful number, since it uses less digits than its factorization.

1252020771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39666 (or 39663 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 1252020771 is about 35383.9055362745. The cubic root of 1252020771 is about 1077.7975150430.

The spelling of 1252020771 in words is "one billion, two hundred fifty-two million, twenty thousand, seven hundred seventy-one".