1390975 has 6 divisors (see below), whose sum is σ = 1724840. Its totient is φ = 1112760.

The previous prime is 1390969. The next prime is 1390979. The reversal of 1390975 is 5790931.

It is not a de Polignac number, because 1390975 - 2³ = 1390967 is a prime.

It is a super-2 number, since 2×1390975² = 3869622901250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1390975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27795 + ... + 27844.

2^1390975 is an apocalyptic number.

1390975 is a deficient number, since it is larger than the sum of its proper divisors (333865).

1390975 is an equidigital number, since it uses as much as digits as its factorization.

1390975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55649 (or 55644 counting only the distinct ones).

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 1390975 is about 1179.3960318739. The cubic root of 1390975 is about 111.6279908635.

The spelling of 1390975 in words is "one million, three hundred ninety thousand, nine hundred seventy-five".