12154907 has 4 divisors (see below), whose sum is σ = 12483456. Its totient is φ = 11826360.

The previous prime is 12154903. The next prime is 12154913. The reversal of 12154907 is 70945121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12154907 - 2² = 12154903 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12154907.

It is not an unprimeable number, because it can be changed into a prime (12154903) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 164219 + ... + 164292.

It is an arithmetic number, because the mean of its divisors is an integer number (3120864).

Almost surely, 2^12154907 is an apocalyptic number.

12154907 is a deficient number, since it is larger than the sum of its proper divisors (328549).

12154907 is an equidigital number, since it uses as much as digits as its factorization.

12154907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328548.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 12154907 is about 3486.3888193946. The cubic root of 12154907 is about 229.9237743623.

The spelling of 12154907 in words is "twelve million, one hundred fifty-four thousand, nine hundred seven".