1252397055 has 128 divisors (see below), whose sum is σ = 2697117696. Its totient is φ = 481075200.

The previous prime is 1252397017. The next prime is 1252397063. The reversal of 1252397055 is 5507932521.

It is not a de Polignac number, because 1252397055 - 2⁶ = 1252396991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 718485 + ... + 720225.

It is an arithmetic number, because the mean of its divisors is an integer number (21071232).

Almost surely, 2^1252397055 is an apocalyptic number.

1252397055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1252397055 is an abundant number, since it is smaller than the sum of its proper divisors (1444720641).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1252397055 is a wasteful number, since it uses less digits than its factorization.

1252397055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817.

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 1252397055 is about 35389.2223000167. Note that the first 3 decimals coincide. The cubic root of 1252397055 is about 1077.9054784643.

The spelling of 1252397055 in words is "one billion, two hundred fifty-two million, three hundred ninety-seven thousand, fifty-five".