12609351 has 10 divisors (see below), whose sum is σ = 18836312. Its totient is φ = 8406180.

The previous prime is 12609323. The next prime is 12609353. The reversal of 12609351 is 15390621.

12609351 is a `hidden beast` number, since 1 + 2 + 609 + 3 + 51 = 666.

12609351 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12609351 - 2⁵ = 12609319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12609353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 77755 + ... + 77916.

Almost surely, 2^12609351 is an apocalyptic number.

12609351 is a deficient number, since it is larger than the sum of its proper divisors (6226961).

12609351 is an equidigital number, since it uses as much as digits as its factorization.

12609351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155683 (or 155674 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 12609351 is about 3550.9647984738. The cubic root of 12609351 is about 232.7542276361.

Subtracting from 12609351 its product of nonzero digits (1620), we obtain a triangular number (12607731 = T₅₀₂₁).

Adding to 12609351 its reverse (15390621), we get a palindrome (27999972).

The spelling of 12609351 in words is "twelve million, six hundred nine thousand, three hundred fifty-one".