1212285900 has 72 divisors (see below), whose sum is σ = 4008632320. Its totient is φ = 277093440.

The previous prime is 1212285887. The next prime is 1212285917. The reversal of 1212285900 is 95822121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 286540 + ... + 290739.

Almost surely, 2^1212285900 is an apocalyptic number.

1212285900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212285900 is an abundant number, since it is smaller than the sum of its proper divisors (2796346420).

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

1212285900 is a wasteful number, since it uses less digits than its factorization.

1212285900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577303 (or 577296 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 1212285900 is about 34817.8962604003. The cubic root of 1212285900 is about 1066.2728504967.

The spelling of 1212285900 in words is "one billion, two hundred twelve million, two hundred eighty-five thousand, nine hundred".