12345405 has 16 divisors (see below), whose sum is σ = 19832064. Its totient is φ = 6557760.

The previous prime is 12345397. The next prime is 12345413. The reversal of 12345405 is 50454321.

12345405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12345397) and next prime (12345413).

It is not a de Polignac number, because 12345405 - 2³ = 12345397 is a prime.

It is a super-2 number, since 2×12345405² = 304818049228050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2547 + ... + 5583.

It is an arithmetic number, because the mean of its divisors is an integer number (1239504).

Almost surely, 2^12345405 is an apocalyptic number.

12345405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12345405 is a deficient number, since it is larger than the sum of its proper divisors (7486659).

12345405 is a wasteful number, since it uses less digits than its factorization.

12345405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 12345405 is about 3513.6028517748. The cubic root of 12345405 is about 231.1187148650.

Adding to 12345405 its reverse (50454321), we get a palindrome (62799726).

The spelling of 12345405 in words is "twelve million, three hundred forty-five thousand, four hundred five".