1387972 has 12 divisors (see below), whose sum is σ = 2465680. Its totient is φ = 683496.

The previous prime is 1387961. The next prime is 1387987. The reversal of 1387972 is 2797831.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2322 + ... + 2857.

2^1387972 is an apocalyptic number.

It is an amenable number.

1387972 is a deficient number, since it is larger than the sum of its proper divisors (1077708).

1387972 is a wasteful number, since it uses less digits than its factorization.

1387972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250 (or 5248 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 1387972 is about 1178.1222347448. The cubic root of 1387972 is about 111.5476011170.

The spelling of 1387972 in words is "one million, three hundred eighty-seven thousand, nine hundred seventy-two".