1265140500 has 96 divisors (see below), whose sum is σ = 3967541760. Its totient is φ = 311414400.

The previous prime is 1265140489. The next prime is 1265140511. The reversal of 1265140500 is 50415621.

It is an interprime number because it is at equal distance from previous prime (1265140489) and next prime (1265140511).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12940 + ... + 51939.

It is an arithmetic number, because the mean of its divisors is an integer number (41328560).

Almost surely, 2^1265140500 is an apocalyptic number.

1265140500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265140500 is an abundant number, since it is smaller than the sum of its proper divisors (2702401260).

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

1265140500 is a wasteful number, since it uses less digits than its factorization.

1265140500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64914 (or 64902 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1265140500 is about 35568.8135871862. The cubic root of 1265140500 is about 1081.5491314881.

The spelling of 1265140500 in words is "one billion, two hundred sixty-five million, one hundred forty thousand, five hundred".