1390812 has 12 divisors (see below), whose sum is σ = 3245256. Its totient is φ = 463600.

The previous prime is 1390801. The next prime is 1390813. The reversal of 1390812 is 2180931.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57939 + ... + 57962.

It is an arithmetic number, because the mean of its divisors is an integer number (270438).

2^1390812 is an apocalyptic number.

1390812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1390812 is an abundant number, since it is smaller than the sum of its proper divisors (1854444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1390812 is a wasteful number, since it uses less digits than its factorization.

1390812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115908 (or 115906 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1390812 is about 1179.3269266832. The cubic root of 1390812 is about 111.6236303554.

The spelling of 1390812 in words is "one million, three hundred ninety thousand, eight hundred twelve".