1357636121 has 2 divisors, whose sum is σ = 1357636122. Its totient is φ = 1357636120.

The previous prime is 1357636043. The next prime is 1357636129. The reversal of 1357636121 is 1216367531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1097265625 + 260370496 = 33125^2 + 16136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1357636121 - 2²⁶ = 1290527257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1357636129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678818060 + 678818061.

It is an arithmetic number, because the mean of its divisors is an integer number (678818061).

Almost surely, 2^1357636121 is an apocalyptic number.

It is an amenable number.

1357636121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1357636121 is an equidigital number, since it uses as much as digits as its factorization.

1357636121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 35.

The square root of 1357636121 is about 36846.1140556233. The cubic root of 1357636121 is about 1107.2893633013.

The spelling of 1357636121 in words is "one billion, three hundred fifty-seven million, six hundred thirty-six thousand, one hundred twenty-one".