12145951 has 4 divisors (see below), whose sum is σ = 12156552. Its totient is φ = 12135352.

The previous prime is 12145937. The next prime is 12145981. The reversal of 12145951 is 15954121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12145951 - 2⁹ = 12145439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12145901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3340 + ... + 5953.

It is an arithmetic number, because the mean of its divisors is an integer number (3039138).

Almost surely, 2^12145951 is an apocalyptic number.

12145951 is a deficient number, since it is larger than the sum of its proper divisors (10601).

12145951 is an equidigital number, since it uses as much as digits as its factorization.

12145951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10600.

The product of its digits is 1800, while the sum is 28.

The square root of 12145951 is about 3485.1041591321. The cubic root of 12145951 is about 229.8672895401.

The spelling of 12145951 in words is "twelve million, one hundred forty-five thousand, nine hundred fifty-one".