1252959639 has 8 divisors (see below), whose sum is σ = 1674699120. Its totient is φ = 833263296.

The previous prime is 1252959637. The next prime is 1252959677. The reversal of 1252959639 is 9369592521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1252959639 - 2¹ = 1252959637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1252959591 and 1252959600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252959637) 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 7 ways as a sum of consecutive naturals, for example, 509352 + ... + 511805.

It is an arithmetic number, because the mean of its divisors is an integer number (209337390).

Almost surely, 2^1252959639 is an apocalyptic number.

1252959639 is a deficient number, since it is larger than the sum of its proper divisors (421739481).

1252959639 is a wasteful number, since it uses less digits than its factorization.

1252959639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021569.

The product of its digits is 1312200, while the sum is 51.

The square root of 1252959639 is about 35397.1699292472. The cubic root of 1252959639 is about 1078.0668547613.

The spelling of 1252959639 in words is "one billion, two hundred fifty-two million, nine hundred fifty-nine thousand, six hundred thirty-nine".