1357121667 has 16 divisors (see below), whose sum is σ = 2019904128. Its totient is φ = 803369280.

The previous prime is 1357121639. The next prime is 1357121669. The reversal of 1357121667 is 7661217531.

It is not a de Polignac number, because 1357121667 - 2⁶ = 1357121603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1357121669) 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, 476778 + ... + 479615.

It is an arithmetic number, because the mean of its divisors is an integer number (126244008).

Almost surely, 2^1357121667 is an apocalyptic number.

1357121667 is a deficient number, since it is larger than the sum of its proper divisors (662782461).

1357121667 is a wasteful number, since it uses less digits than its factorization.

1357121667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956450.

The product of its digits is 52920, while the sum is 39.

The square root of 1357121667 is about 36839.1322780545. The cubic root of 1357121667 is about 1107.1494825676.

The spelling of 1357121667 in words is "one billion, three hundred fifty-seven million, one hundred twenty-one thousand, six hundred sixty-seven".