1312589540 has 24 divisors (see below), whose sum is σ = 2901514560. Its totient is φ = 497402208.

The previous prime is 1312589479. The next prime is 1312589543. The reversal of 1312589540 is 459852131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 1312589494 and 1312589503.

It is not an unprimeable number, because it can be changed into a prime (1312589543) 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, 1726712 + ... + 1727471.

It is an arithmetic number, because the mean of its divisors is an integer number (120896440).

Almost surely, 2^1312589540 is an apocalyptic number.

1312589540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312589540 is an abundant number, since it is smaller than the sum of its proper divisors (1588925020).

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

1312589540 is a wasteful number, since it uses less digits than its factorization.

1312589540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3454211 (or 3454209 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 1312589540 is about 36229.6776138016. The cubic root of 1312589540 is about 1094.9046823197.

The spelling of 1312589540 in words is "one billion, three hundred twelve million, five hundred eighty-nine thousand, five hundred forty".