1213900 has 36 divisors (see below), whose sum is σ = 2690800. Its totient is φ = 475200.

The previous prime is 1213897. The next prime is 1213907. The reversal of 1213900 is 93121.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1213907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6001 + ... + 6199.

2^1213900 is an apocalyptic number.

1213900 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 1213900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345400).

1213900 is an abundant number, since it is smaller than the sum of its proper divisors (1476900).

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

1213900 is a wasteful number, since it uses less digits than its factorization.

1213900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1213900 is about 1101.7713011329. The cubic root of 1213900 is about 106.6745870855.

The spelling of 1213900 in words is "one million, two hundred thirteen thousand, nine hundred".