1216940 has 24 divisors (see below), whose sum is σ = 2594592. Its totient is φ = 479360.

The previous prime is 1216939. The next prime is 1216951. The reversal of 1216940 is 496121.

It is a happy 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, 992 + ... + 1848.

It is an arithmetic number, because the mean of its divisors is an integer number (108108).

2^1216940 is an apocalyptic number.

1216940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216940 is an abundant number, since it is smaller than the sum of its proper divisors (1377652).

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

1216940 is a wasteful number, since it uses less digits than its factorization.

1216940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937 (or 935 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1216940 is about 1103.1500351267. The cubic root of 1216940 is about 106.7635621276.

The spelling of 1216940 in words is "one million, two hundred sixteen thousand, nine hundred forty".