1252802639 has 16 divisors (see below), whose sum is σ = 1488240000. Its totient is φ = 1041757920.

The previous prime is 1252802633. The next prime is 1252802651. The reversal of 1252802639 is 9362082521.

It is a cyclic number.

It is not a de Polignac number, because 1252802639 - 2¹² = 1252798543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252802633) 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 15 ways as a sum of consecutive naturals, for example, 97289 + ... + 109410.

It is an arithmetic number, because the mean of its divisors is an integer number (93015000).

Almost surely, 2^1252802639 is an apocalyptic number.

1252802639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1252802639 is a deficient number, since it is larger than the sum of its proper divisors (235437361).

1252802639 is a wasteful number, since it uses less digits than its factorization.

1252802639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206758.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1252802639 is about 35394.9521683530. The cubic root of 1252802639 is about 1078.0218244291.

The spelling of 1252802639 in words is "one billion, two hundred fifty-two million, eight hundred two thousand, six hundred thirty-nine".