1357121707 has 4 divisors (see below), whose sum is σ = 1360345696. Its totient is φ = 1353897720.

The previous prime is 1357121699. The next prime is 1357121719. The reversal of 1357121707 is 7071217531.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1357121707 - 2³ = 1357121699 is a prime.

It is a super-2 number, since 2×1357121707² = 3683558655221187698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1357124707) 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, 1611363 + ... + 1612204.

It is an arithmetic number, because the mean of its divisors is an integer number (340086424).

Almost surely, 2^1357121707 is an apocalyptic number.

1357121707 is a deficient number, since it is larger than the sum of its proper divisors (3223989).

1357121707 is an equidigital number, since it uses as much as digits as its factorization.

1357121707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223988.

The product of its (nonzero) digits is 10290, while the sum is 34.

The square root of 1357121707 is about 36839.1328209555. The cubic root of 1357121707 is about 1107.1494934450.

The spelling of 1357121707 in words is "one billion, three hundred fifty-seven million, one hundred twenty-one thousand, seven hundred seven".