1252650640 has 40 divisors (see below), whose sum is σ = 2924062848. Its totient is φ = 499056000.

The previous prime is 1252650629. The next prime is 1252650683. The reversal of 1252650640 is 460562521.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11112 + ... + 51271.

Almost surely, 2^1252650640 is an apocalyptic number.

1252650640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252650640 is an abundant number, since it is smaller than the sum of its proper divisors (1671412208).

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

1252650640 is a wasteful number, since it uses less digits than its factorization.

1252650640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62647 (or 62641 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1252650640 is about 35392.8049185142. The cubic root of 1252650640 is about 1077.9782248864.

The spelling of 1252650640 in words is "one billion, two hundred fifty-two million, six hundred fifty thousand, six hundred forty".