1390807 has 8 divisors (see below), whose sum is σ = 1543680. Its totient is φ = 1242360.

The previous prime is 1390801. The next prime is 1390813. The reversal of 1390807 is 7080931.

It is an interprime number because it is at equal distance from previous prime (1390801) and next prime (1390813).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1390807 - 2¹⁵ = 1358039 is a prime.

It is a super-2 number, since 2×1390807² = 3868688222498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423 + ... + 1720.

It is an arithmetic number, because the mean of its divisors is an integer number (192960).

2^1390807 is an apocalyptic number.

1390807 is a deficient number, since it is larger than the sum of its proper divisors (152873).

1390807 is a wasteful number, since it uses less digits than its factorization.

1390807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1390807 is about 1179.3248068280. The cubic root of 1390807 is about 111.6234965921.

It can be divided in two parts, 1390 and 807, that added together give a cube (2197 = 13³).

The spelling of 1390807 in words is "one million, three hundred ninety thousand, eight hundred seven".