1312961505 has 16 divisors (see below), whose sum is σ = 2101187520. Its totient is φ = 700096448.

The previous prime is 1312961483. The next prime is 1312961543. The reversal of 1312961505 is 5051692131.

It is a cyclic number.

It is not a de Polignac number, because 1312961505 - 2⁵ = 1312961473 is a prime.

It is a super-2 number, since 2×1312961505² = 3447735827223730050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134686 + ... + 144104.

It is an arithmetic number, because the mean of its divisors is an integer number (131324220).

Almost surely, 2^1312961505 is an apocalyptic number.

1312961505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312961505 is a deficient number, since it is larger than the sum of its proper divisors (788226015).

1312961505 is an equidigital number, since it uses as much as digits as its factorization.

1312961505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18720.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 1312961505 is about 36234.8106797869. The cubic root of 1312961505 is about 1095.0080981866.

The spelling of 1312961505 in words is "one billion, three hundred twelve million, nine hundred sixty-one thousand, five hundred five".