1387975 has 12 divisors (see below), whose sum is σ = 1752120. Its totient is φ = 1090400.

The previous prime is 1387961. The next prime is 1387987. The reversal of 1387975 is 5797831.

It is not a de Polignac number, because 1387975 - 2⁵ = 1387943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1005 + ... + 1945.

It is an arithmetic number, because the mean of its divisors is an integer number (146010).

2^1387975 is an apocalyptic number.

1387975 is a deficient number, since it is larger than the sum of its proper divisors (364145).

1387975 is an equidigital number, since it uses as much as digits as its factorization.

1387975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010 (or 1005 counting only the distinct ones).

The product of its digits is 52920, while the sum is 40.

The square root of 1387975 is about 1178.1235079566. The cubic root of 1387975 is about 111.5476814843.

The spelling of 1387975 in words is "one million, three hundred eighty-seven thousand, nine hundred seventy-five".