1252145240 has 16 divisors (see below), whose sum is σ = 2817326880. Its totient is φ = 500858080.

The previous prime is 1252145233. The next prime is 1252145287. The reversal of 1252145240 is 425412521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15651776 + ... + 15651855.

It is an arithmetic number, because the mean of its divisors is an integer number (176082930).

Almost surely, 2^1252145240 is an apocalyptic number.

1252145240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252145240 is an abundant number, since it is smaller than the sum of its proper divisors (1565181640).

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

1252145240 is a wasteful number, since it uses less digits than its factorization.

1252145240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31303642 (or 31303638 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 1252145240 is about 35385.6643289341. The cubic root of 1252145240 is about 1077.8332300878.

Adding to 1252145240 its reverse (425412521), we get a palindrome (1677557761).

The spelling of 1252145240 in words is "one billion, two hundred fifty-two million, one hundred forty-five thousand, two hundred forty".