1312390 has 16 divisors (see below), whose sum is σ = 2426832. Its totient is φ = 510624.

The previous prime is 1312379. The next prime is 1312391. The reversal of 1312390 is 932131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1404 + ... + 2143.

It is an arithmetic number, because the mean of its divisors is an integer number (151677).

2^1312390 is an apocalyptic number.

1312390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312390 is a deficient number, since it is larger than the sum of its proper divisors (1114442).

1312390 is a wasteful number, since it uses less digits than its factorization.

1312390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 1312390 is about 1145.5959147972. The cubic root of 1312390 is about 109.4849197000.

It can be divided in two parts, 13 and 12390, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 1312390 in words is "one million, three hundred twelve thousand, three hundred ninety".