12156450 has 24 divisors (see below), whose sum is σ = 30148368. Its totient is φ = 3241680.

The previous prime is 12156439. The next prime is 12156467. The reversal of 12156450 is 5465121.

It is a self number, because there is not a number n which added to its sum of digits gives 12156450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40372 + ... + 40671.

It is an arithmetic number, because the mean of its divisors is an integer number (1256182).

Almost surely, 2^12156450 is an apocalyptic number.

12156450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12156450 is an abundant number, since it is smaller than the sum of its proper divisors (17991918).

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

12156450 is a wasteful number, since it uses less digits than its factorization.

12156450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81058 (or 81053 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 12156450 is about 3486.6101015169. The cubic root of 12156450 is about 229.9335031457.

The spelling of 12156450 in words is "twelve million, one hundred fifty-six thousand, four hundred fifty".