1252445439 has 48 divisors (see below), whose sum is σ = 2053641600. Its totient is φ = 675089856.

The previous prime is 1252445423. The next prime is 1252445443. The reversal of 1252445439 is 9345442521.

It is not a de Polignac number, because 1252445439 - 2⁴ = 1252445423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1252445397 and 1252445406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252445479) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 750484 + ... + 752150.

It is an arithmetic number, because the mean of its divisors is an integer number (42784200).

Almost surely, 2^1252445439 is an apocalyptic number.

1252445439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1252445439 is a deficient number, since it is larger than the sum of its proper divisors (801196161).

1252445439 is a wasteful number, since it uses less digits than its factorization.

1252445439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972 (or 1965 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The square root of 1252445439 is about 35389.9058913696. The cubic root of 1252445439 is about 1077.9193592345.

The spelling of 1252445439 in words is "one billion, two hundred fifty-two million, four hundred forty-five thousand, four hundred thirty-nine".