1312987850 has 24 divisors (see below), whose sum is σ = 2443156128. Its totient is φ = 524980400.

The previous prime is 1312987831. The next prime is 1312987859. The reversal of 1312987850 is 587892131.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1312987859) 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, 184865 + ... + 191835.

It is an arithmetic number, because the mean of its divisors is an integer number (101798172).

Almost surely, 2^1312987850 is an apocalyptic number.

1312987850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312987850 is a deficient number, since it is larger than the sum of its proper divisors (1130168278).

1312987850 is a wasteful number, since it uses less digits than its factorization.

1312987850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10750 (or 10745 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 1312987850 is about 36235.1742095992. The cubic root of 1312987850 is about 1095.0154220356.

The spelling of 1312987850 in words is "one billion, three hundred twelve million, nine hundred eighty-seven thousand, eight hundred fifty".