1390486 has 4 divisors (see below), whose sum is σ = 2085732. Its totient is φ = 695242.

The previous prime is 1390483. The next prime is 1390489. The reversal of 1390486 is 6840931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6840931 = 19 ⋅360049.

It is an interprime number because it is at equal distance from previous prime (1390483) and next prime (1390489).

It is a super-3 number, since 3×1390486³ = 8065310960556333768, which contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347620 + ... + 347623.

It is an arithmetic number, because the mean of its divisors is an integer number (521433).

2^1390486 is an apocalyptic number.

1390486 is a deficient number, since it is larger than the sum of its proper divisors (695246).

1390486 is an equidigital number, since it uses as much as digits as its factorization.

1390486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695245.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1390486 is about 1179.1887041521. The cubic root of 1390486 is about 111.6149083170.

The spelling of 1390486 in words is "one million, three hundred ninety thousand, four hundred eighty-six".