1252650139 has 24 divisors (see below), whose sum is σ = 1408977024. Its totient is φ = 1111968000.

The previous prime is 1252650109. The next prime is 1252650167. The reversal of 1252650139 is 9310562521.

It is not a de Polignac number, because 1252650139 - 2⁹ = 1252649627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1252650109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 947599 + ... + 948919.

It is an arithmetic number, because the mean of its divisors is an integer number (58707376).

Almost surely, 2^1252650139 is an apocalyptic number.

1252650139 is a deficient number, since it is larger than the sum of its proper divisors (156326885).

1252650139 is a wasteful number, since it uses less digits than its factorization.

1252650139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559 (or 1546 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 1252650139 is about 35392.7978408037. The cubic root of 1252650139 is about 1077.9780811732.

The spelling of 1252650139 in words is "one billion, two hundred fifty-two million, six hundred fifty thousand, one hundred thirty-nine".