1912140 has 48 divisors (see below), whose sum is σ = 5950560. Its totient is φ = 509760.

The previous prime is 1912139. The next prime is 1912147. The reversal of 1912140 is 412191.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1912147) 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 15 ways as a sum of consecutive naturals, for example, 1231 + ... + 2310.

It is an arithmetic number, because the mean of its divisors is an integer number (123970).

2^1912140 is an apocalyptic number.

1912140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1912140 is an abundant number, since it is smaller than the sum of its proper divisors (4038420).

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

1912140 is a wasteful number, since it uses less digits than its factorization.

1912140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3559 (or 3551 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1912140 is about 1382.8015041936. The cubic root of 1912140 is about 124.1194651652.

The spelling of 1912140 in words is "one million, nine hundred twelve thousand, one hundred forty".