1312654521 has 16 divisors (see below), whose sum is σ = 1811491200. Its totient is φ = 844491648.

The previous prime is 1312654487. The next prime is 1312654523. The reversal of 1312654521 is 1254562131.

1312654521 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1312654521 - 2⁷ = 1312654393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312654523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321525 + ... + 325581.

It is an arithmetic number, because the mean of its divisors is an integer number (113218200).

Almost surely, 2^1312654521 is an apocalyptic number.

It is an amenable number.

1312654521 is a deficient number, since it is larger than the sum of its proper divisors (498836679).

1312654521 is a wasteful number, since it uses less digits than its factorization.

1312654521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7808.

The product of its digits is 7200, while the sum is 30.

The square root of 1312654521 is about 36230.5743951155. The cubic root of 1312654521 is about 1094.9227501226.

The spelling of 1312654521 in words is "one billion, three hundred twelve million, six hundred fifty-four thousand, five hundred twenty-one".