12923405 has 24 divisors (see below), whose sum is σ = 17495352. Its totient is φ = 9152000.

The previous prime is 12923387. The next prime is 12923453. The reversal of 12923405 is 50432921.

It can be written as a sum of positive squares in 4 ways, for example, as 64009 + 12859396 = 253^2 + 3586^2 .

It is not a de Polignac number, because 12923405 - 2⁶ = 12923341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24545 + ... + 25065.

It is an arithmetic number, because the mean of its divisors is an integer number (728973).

Almost surely, 2^12923405 is an apocalyptic number.

It is an amenable number.

12923405 is a deficient number, since it is larger than the sum of its proper divisors (4571947).

12923405 is a wasteful number, since it uses less digits than its factorization.

12923405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 12923405 is about 3594.9137680896. The cubic root of 12923405 is about 234.6707627323.

The spelling of 12923405 in words is "twelve million, nine hundred twenty-three thousand, four hundred five".