1356139871 has 4 divisors (see below), whose sum is σ = 1356235152. Its totient is φ = 1356044592.

The previous prime is 1356139867. The next prime is 1356139931. The reversal of 1356139871 is 1789316531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1356139871 - 2² = 1356139867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356139571) 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, 21515 + ... + 56348.

It is an arithmetic number, because the mean of its divisors is an integer number (339058788).

Almost surely, 2^1356139871 is an apocalyptic number.

1356139871 is a deficient number, since it is larger than the sum of its proper divisors (95281).

1356139871 is an equidigital number, since it uses as much as digits as its factorization.

1356139871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95280.

The product of its digits is 136080, while the sum is 44.

The square root of 1356139871 is about 36825.8044175548. The cubic root of 1356139871 is about 1106.8824327787.

The spelling of 1356139871 in words is "one billion, three hundred fifty-six million, one hundred thirty-nine thousand, eight hundred seventy-one".