1357790721 has 16 divisors (see below), whose sum is σ = 2070883200. Its totient is φ = 775179648.

The previous prime is 1357790713. The next prime is 1357790743. The reversal of 1357790721 is 1270977531.

It is not a de Polignac number, because 1357790721 - 2³ = 1357790713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1357790761) 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, 4926 + ... + 52343.

It is an arithmetic number, because the mean of its divisors is an integer number (129430200).

Almost surely, 2^1357790721 is an apocalyptic number.

It is an amenable number.

1357790721 is a deficient number, since it is larger than the sum of its proper divisors (713092479).

1357790721 is a wasteful number, since it uses less digits than its factorization.

1357790721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58408.

The product of its (nonzero) digits is 92610, while the sum is 42.

The square root of 1357790721 is about 36848.2119104849. The cubic root of 1357790721 is about 1107.3313923437.

The spelling of 1357790721 in words is "one billion, three hundred fifty-seven million, seven hundred ninety thousand, seven hundred twenty-one".