1315640 has 32 divisors (see below), whose sum is σ = 3058560. Its totient is φ = 508800.

The previous prime is 1315637. The next prime is 1315651. The reversal of 1315640 is 465131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 710 + ... + 1770.

It is an arithmetic number, because the mean of its divisors is an integer number (95580).

2^1315640 is an apocalyptic number.

1315640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1315640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1529280).

1315640 is an abundant number, since it is smaller than the sum of its proper divisors (1742920).

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

1315640 is a wasteful number, since it uses less digits than its factorization.

1315640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1315640 is about 1147.0135134339. The cubic root of 1315640 is about 109.5752212796.

The spelling of 1315640 in words is "one million, three hundred fifteen thousand, six hundred forty".