1397101272 has 64 divisors (see below), whose sum is σ = 4002324480. Its totient is φ = 398111232.

The previous prime is 1397101249. The next prime is 1397101283. The reversal of 1397101272 is 2721017931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53488 + ... + 75200.

It is an arithmetic number, because the mean of its divisors is an integer number (62536320).

Almost surely, 2^1397101272 is an apocalyptic number.

1397101272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397101272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2001162240).

1397101272 is an abundant number, since it is smaller than the sum of its proper divisors (2605223208).

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

1397101272 is a wasteful number, since it uses less digits than its factorization.

1397101272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22112 (or 22108 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 1397101272 is about 37377.8179138376. The cubic root of 1397101272 is about 1117.9163193160.

The spelling of 1397101272 in words is "one billion, three hundred ninety-seven million, one hundred one thousand, two hundred seventy-two".