1318920 has 64 divisors (see below), whose sum is σ = 4104000. Its totient is φ = 338688.

The previous prime is 1318913. The next prime is 1318927. The reversal of 1318920 is 298131.

It is an interprime number because it is at equal distance from previous prime (1318913) and next prime (1318927).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1318927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3291 + ... + 3669.

It is an arithmetic number, because the mean of its divisors is an integer number (64125).

2^1318920 is an apocalyptic number.

1318920 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 1318920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2052000).

1318920 is an abundant number, since it is smaller than the sum of its proper divisors (2785080).

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

1318920 is a wasteful number, since it uses less digits than its factorization.

1318920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 418 counting only the distinct ones).

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

The square root of 1318920 is about 1148.4424234588. The cubic root of 1318920 is about 109.6662057591. Note that the first 3 decimals are identical.

The spelling of 1318920 in words is "one million, three hundred eighteen thousand, nine hundred twenty".