1253564940 has 24 divisors (see below), whose sum is σ = 3509982000. Its totient is φ = 334283968.

The previous prime is 1253564909. The next prime is 1253564941. The reversal of 1253564940 is 494653521.

It is not an unprimeable number, because it can be changed into a prime (1253564941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10446315 + ... + 10446434.

It is an arithmetic number, because the mean of its divisors is an integer number (146249250).

Almost surely, 2^1253564940 is an apocalyptic number.

1253564940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253564940 is an abundant number, since it is smaller than the sum of its proper divisors (2256417060).

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

1253564940 is a wasteful number, since it uses less digits than its factorization.

1253564940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20892761 (or 20892759 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 1253564940 is about 35405.7190295579. The cubic root of 1253564940 is about 1078.2404304218.

The spelling of 1253564940 in words is "one billion, two hundred fifty-three million, five hundred sixty-four thousand, nine hundred forty".