1252775140 has 12 divisors (see below), whose sum is σ = 2630827836. Its totient is φ = 501110048.

The previous prime is 1252775137. The next prime is 1252775149. The reversal of 1252775140 is 415772521.

It can be written as a sum of positive squares in 2 ways, for example, as 465523776 + 787251364 = 21576^2 + 28058^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1252775096 and 1252775105.

It is not an unprimeable number, because it can be changed into a prime (1252775149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31319359 + ... + 31319398.

It is an arithmetic number, because the mean of its divisors is an integer number (219235653).

Almost surely, 2^1252775140 is an apocalyptic number.

1252775140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252775140 is an abundant number, since it is smaller than the sum of its proper divisors (1378052696).

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

1252775140 is a wasteful number, since it uses less digits than its factorization.

1252775140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62638766 (or 62638764 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 1252775140 is about 35394.5637068745. The cubic root of 1252775140 is about 1078.0139368502.

The spelling of 1252775140 in words is "one billion, two hundred fifty-two million, seven hundred seventy-five thousand, one hundred forty".