1357135561 has 4 divisors (see below), whose sum is σ = 1364024772. Its totient is φ = 1350246352.

The previous prime is 1357135541. The next prime is 1357135579. The reversal of 1357135561 is 1655317531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1195845561 + 161290000 = 34581^2 + 12700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1357135561 - 2⁷ = 1357135433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1357135561.

It is not an unprimeable number, because it can be changed into a prime (1357135541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3444310 + ... + 3444703.

It is an arithmetic number, because the mean of its divisors is an integer number (341006193).

Almost surely, 2^1357135561 is an apocalyptic number.

It is an amenable number.

1357135561 is a deficient number, since it is larger than the sum of its proper divisors (6889211).

1357135561 is an equidigital number, since it uses as much as digits as its factorization.

1357135561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6889210.

The product of its digits is 47250, while the sum is 37.

The square root of 1357135561 is about 36839.3208542177. The cubic root of 1357135561 is about 1107.1532608292.

The spelling of 1357135561 in words is "one billion, three hundred fifty-seven million, one hundred thirty-five thousand, five hundred sixty-one".