1397280231 has 12 divisors (see below), whose sum is σ = 2018691480. Its totient is φ = 931336560.

The previous prime is 1397280223. The next prime is 1397280239. The reversal of 1397280231 is 1320827931.

It is an interprime number because it is at equal distance from previous prime (1397280223) and next prime (1397280239).

It is not a de Polignac number, because 1397280231 - 2³ = 1397280223 is a prime.

It is a super-2 number, since 2×1397280231² = 3904784087886826722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397280239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45700 + ... + 69878.

It is an arithmetic number, because the mean of its divisors is an integer number (168224290).

Almost surely, 2^1397280231 is an apocalyptic number.

1397280231 is a deficient number, since it is larger than the sum of its proper divisors (621411249).

1397280231 is a wasteful number, since it uses less digits than its factorization.

1397280231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30606 (or 30603 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1397280231 is about 37380.2117570246. The cubic root of 1397280231 is about 1117.9640497250.

The spelling of 1397280231 in words is "one billion, three hundred ninety-seven million, two hundred eighty thousand, two hundred thirty-one".