1012540140 has 36 divisors (see below), whose sum is σ = 3071372304. Its totient is φ = 270010656.

The previous prime is 1012540117. The next prime is 1012540147. The reversal of 1012540140 is 410452101.

1012540140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1012540140² = 2050475070222439200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1012540147) 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, 2812432 + ... + 2812791.

Almost surely, 2^1012540140 is an apocalyptic number.

1012540140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012540140 is an abundant number, since it is smaller than the sum of its proper divisors (2058832164).

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

1012540140 is a wasteful number, since it uses less digits than its factorization.

1012540140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5625238 (or 5625233 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1012540140 is about 31820.4358863923. The cubic root of 1012540140 is about 1004.1626945966.

Adding to 1012540140 its reverse (410452101), we get a palindrome (1422992241).

The spelling of 1012540140 in words is "one billion, twelve million, five hundred forty thousand, one hundred forty".