1312040 has 16 divisors (see below), whose sum is σ = 2952180. Its totient is φ = 524800.

The previous prime is 1312027. The next prime is 1312079. The reversal of 1312040 is 402131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1223236 + 88804 = 1106^2 + 298^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16361 + ... + 16440.

2^1312040 is an apocalyptic number.

1312040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312040 is an abundant number, since it is smaller than the sum of its proper divisors (1640140).

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

1312040 is a wasteful number, since it uses less digits than its factorization.

1312040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32812 (or 32808 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1312040 is about 1145.4431456864. The cubic root of 1312040 is about 109.4751860261.

Adding to 1312040 its reverse (402131), we get a palindrome (1714171).

Subtracting from 1312040 its reverse (402131), we obtain a palindrome (909909).

It can be divided in two parts, 13120 and 40, that multiplied together give a triangular number (524800 = T₁₀₂₄).

The spelling of 1312040 in words is "one million, three hundred twelve thousand, forty".