12653405 has 4 divisors (see below), whose sum is σ = 15184092. Its totient is φ = 10122720.

The previous prime is 12653357. The next prime is 12653429. The reversal of 12653405 is 50435621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50435621 = 5009 ⋅10069.

It can be written as a sum of positive squares in 2 ways, for example, as 4439449 + 8213956 = 2107^2 + 2866^2 .

It is not a de Polignac number, because 12653405 - 2⁶ = 12653341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1265336 + ... + 1265345.

It is an arithmetic number, because the mean of its divisors is an integer number (3796023).

Almost surely, 2^12653405 is an apocalyptic number.

It is an amenable number.

12653405 is a deficient number, since it is larger than the sum of its proper divisors (2530687).

12653405 is an equidigital number, since it uses as much as digits as its factorization.

12653405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2530686.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 12653405 is about 3557.1624927743. The cubic root of 12653405 is about 233.0249747585.

The spelling of 12653405 in words is "twelve million, six hundred fifty-three thousand, four hundred five".