12151491 has 8 divisors (see below), whose sum is σ = 17674944. Its totient is φ = 7364520.

The previous prime is 12151483. The next prime is 12151501. The reversal of 12151491 is 19415121.

It is a happy number.

12151491 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12151491 - 2³ = 12151483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12151471) 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 7 ways as a sum of consecutive naturals, for example, 184081 + ... + 184146.

It is an arithmetic number, because the mean of its divisors is an integer number (2209368).

Almost surely, 2^12151491 is an apocalyptic number.

12151491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12151491 is a deficient number, since it is larger than the sum of its proper divisors (5523453).

12151491 is a wasteful number, since it uses less digits than its factorization.

12151491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368241.

The product of its digits is 360, while the sum is 24.

The square root of 12151491 is about 3485.8988797726. The cubic root of 12151491 is about 229.9022331800.

The spelling of 12151491 in words is "twelve million, one hundred fifty-one thousand, four hundred ninety-one".