1252020739 has 2 divisors, whose sum is σ = 1252020740. Its totient is φ = 1252020738.

The previous prime is 1252020703. The next prime is 1252020779. The reversal of 1252020739 is 9370202521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1252020739 - 2¹³ = 1252012547 is a prime.

It is a super-2 number, since 2×1252020739² = 3135111861772212242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1252020739.

It is not a weakly prime, because it can be changed into another prime (1252020779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626010369 + 626010370.

It is an arithmetic number, because the mean of its divisors is an integer number (626010370).

Almost surely, 2^1252020739 is an apocalyptic number.

1252020739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252020739 is an equidigital number, since it uses as much as digits as its factorization.

1252020739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 1252020739 is about 35383.9050840916. The cubic root of 1252020739 is about 1077.7975058607.

The spelling of 1252020739 in words is "one billion, two hundred fifty-two million, twenty thousand, seven hundred thirty-nine".