12405634 has 4 divisors (see below), whose sum is σ = 18608454. Its totient is φ = 6202816.

The previous prime is 12405623. The next prime is 12405637. The reversal of 12405634 is 43650421.

12405634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 11189025 + 1216609 = 3345^2 + 1103^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12405599 and 12405608.

It is not an unprimeable number, because it can be changed into a prime (12405637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3101407 + ... + 3101410.

Almost surely, 2^12405634 is an apocalyptic number.

12405634 is a deficient number, since it is larger than the sum of its proper divisors (6202820).

12405634 is an equidigital number, since it uses as much as digits as its factorization.

12405634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6202819.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 12405634 is about 3522.1632557279. The cubic root of 12405634 is about 231.4939549694.

The spelling of 12405634 in words is "twelve million, four hundred five thousand, six hundred thirty-four".