1265140900 has 36 divisors (see below), whose sum is σ = 2786345968. Its totient is φ = 498500640.

The previous prime is 1265140843. The next prime is 1265140909. The reversal of 1265140900 is 90415621.

It is not an unprimeable number, because it can be changed into a prime (1265140909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87714 + ... + 101113.

Almost surely, 2^1265140900 is an apocalyptic number.

1265140900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265140900 is an abundant number, since it is smaller than the sum of its proper divisors (1521205068).

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

1265140900 is a wasteful number, since it uses less digits than its factorization.

1265140900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188908 (or 188901 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1265140900 is about 35568.8192100891. The cubic root of 1265140900 is about 1081.5492454727.

The spelling of 1265140900 in words is "one billion, two hundred sixty-five million, one hundred forty thousand, nine hundred".