1312720574 has 16 divisors (see below), whose sum is σ = 2163772656. Its totient is φ = 592334400.

The previous prime is 1312720571. The next prime is 1312720601. The reversal of 1312720574 is 4750272131.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312720574.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312720571) 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, 214757 + ... + 220784.

It is an arithmetic number, because the mean of its divisors is an integer number (135235791).

Almost surely, 2^1312720574 is an apocalyptic number.

1312720574 is a deficient number, since it is larger than the sum of its proper divisors (851052082).

1312720574 is a wasteful number, since it uses less digits than its factorization.

1312720574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435691.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 1312720574 is about 36231.4859479983. The cubic root of 1312720574 is about 1094.9411153812.

The spelling of 1312720574 in words is "one billion, three hundred twelve million, seven hundred twenty thousand, five hundred seventy-four".