1357716921 has 12 divisors (see below), whose sum is σ = 1989822576. Its totient is φ = 822858520.

The previous prime is 1357716911. The next prime is 1357716923. The reversal of 1357716921 is 1296177531.

It is not a de Polignac number, because 1357716921 - 2¹¹ = 1357714873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1357716923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1869771 + ... + 1870496.

It is an arithmetic number, because the mean of its divisors is an integer number (165818548).

Almost surely, 2^1357716921 is an apocalyptic number.

1357716921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1357716921 is a deficient number, since it is larger than the sum of its proper divisors (632105655).

1357716921 is a wasteful number, since it uses less digits than its factorization.

1357716921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740292 (or 3740281 counting only the distinct ones).

The product of its digits is 79380, while the sum is 42.

The square root of 1357716921 is about 36847.2104914334. The cubic root of 1357716921 is about 1107.3113297189.

The spelling of 1357716921 in words is "one billion, three hundred fifty-seven million, seven hundred sixteen thousand, nine hundred twenty-one".