1357304721 has 16 divisors (see below), whose sum is σ = 1823891328. Its totient is φ = 897811200.

The previous prime is 1357304677. The next prime is 1357304743. The reversal of 1357304721 is 1274037531.

It is not a de Polignac number, because 1357304721 - 2¹¹ = 1357302673 is a prime.

It is a super-2 number, since 2×1357304721² = 3684552211297775682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1357304521) 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, 413316 + ... + 416586.

It is an arithmetic number, because the mean of its divisors is an integer number (113993208).

Almost surely, 2^1357304721 is an apocalyptic number.

It is an amenable number.

1357304721 is a deficient number, since it is larger than the sum of its proper divisors (466586607).

1357304721 is a wasteful number, since it uses less digits than its factorization.

1357304721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4312.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 1357304721 is about 36841.6166990538. The cubic root of 1357304721 is about 1107.1992592468.

The spelling of 1357304721 in words is "one billion, three hundred fifty-seven million, three hundred four thousand, seven hundred twenty-one".