1212900 has 72 divisors (see below), whose sum is σ = 3791424. Its totient is φ = 297600.

The previous prime is 1212889. The next prime is 1212907. The reversal of 1212900 is 92121.

It is a happy number.

It is a super-2 number, since 2×1212900² = 2942252820000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1212900.

It is not an unprimeable number, because it can be changed into a prime (1212907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3745 + ... + 4055.

2^1212900 is an apocalyptic number.

1212900 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 1212900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1895712).

1212900 is an abundant number, since it is smaller than the sum of its proper divisors (2578524).

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

1212900 is a wasteful number, since it uses less digits than its factorization.

1212900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1212900 is about 1101.3173929436. The cubic root of 1212900 is about 106.6452865135.

It can be divided in two parts, 1212 and 900, that added together give a palindrome (2112).

The spelling of 1212900 in words is "one million, two hundred twelve thousand, nine hundred".