1397901156 has 12 divisors (see below), whose sum is σ = 3261769392. Its totient is φ = 465967048.

The previous prime is 1397901151. The next prime is 1397901161. The reversal of 1397901156 is 6511097931.

It is an interprime number because it is at equal distance from previous prime (1397901151) and next prime (1397901161).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1397901156² = 3908255283892272672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1397901151) 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, 58245870 + ... + 58245893.

It is an arithmetic number, because the mean of its divisors is an integer number (271814116).

Almost surely, 2^1397901156 is an apocalyptic number.

It is an amenable number.

1397901156 is an abundant number, since it is smaller than the sum of its proper divisors (1863868236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1397901156 is a wasteful number, since it uses less digits than its factorization.

1397901156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116491770 (or 116491768 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 42.

The square root of 1397901156 is about 37388.5163653227. The cubic root of 1397901156 is about 1118.1296259188.

The spelling of 1397901156 in words is "one billion, three hundred ninety-seven million, nine hundred one thousand, one hundred fifty-six".