12355409 has 4 divisors (see below), whose sum is σ = 13478640. Its totient is φ = 11232180.

The previous prime is 12355381. The next prime is 12355411. The reversal of 12355409 is 90455321.

12355409 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12355409 - 2⁸ = 12355153 is a prime.

It is a super-2 number, since 2×12355409² = 305312263114562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12352409) 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, 561599 + ... + 561620.

It is an arithmetic number, because the mean of its divisors is an integer number (3369660).

Almost surely, 2^12355409 is an apocalyptic number.

It is an amenable number.

12355409 is a deficient number, since it is larger than the sum of its proper divisors (1123231).

12355409 is a wasteful number, since it uses less digits than its factorization.

12355409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123230.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 12355409 is about 3515.0261734445. The cubic root of 12355409 is about 231.1811264092.

The spelling of 12355409 in words is "twelve million, three hundred fifty-five thousand, four hundred nine".