1213880 has 16 divisors (see below), whose sum is σ = 2731320. Its totient is φ = 485536.

The previous prime is 1213879. The next prime is 1213897. The reversal of 1213880 is 883121.

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, 15134 + ... + 15213.

2^1213880 is an apocalyptic number.

1213880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213880 is an abundant number, since it is smaller than the sum of its proper divisors (1517440).

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

1213880 is a wasteful number, since it uses less digits than its factorization.

1213880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30358 (or 30354 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1213880 is about 1101.7622248017. The cubic root of 1213880 is about 106.6740012318.

The spelling of 1213880 in words is "one million, two hundred thirteen thousand, eight hundred eighty".