1012643500 has 48 divisors (see below), whose sum is σ = 2412682272. Its totient is φ = 368232000.

The previous prime is 1012643497. The next prime is 1012643501. The reversal of 1012643500 is 53462101.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1012643501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86559 + ... + 97558.

It is an arithmetic number, because the mean of its divisors is an integer number (50264214).

Almost surely, 2^1012643500 is an apocalyptic number.

1012643500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012643500 is an abundant number, since it is smaller than the sum of its proper divisors (1400038772).

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

1012643500 is a wasteful number, since it uses less digits than its factorization.

1012643500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184147 (or 184135 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1012643500 is about 31822.0599584628. The cubic root of 1012643500 is about 1004.1968617111.

The spelling of 1012643500 in words is "one billion, twelve million, six hundred forty-three thousand, five hundred".