13912405 has 16 divisors (see below), whose sum is σ = 18088560. Its totient is φ = 10211328.

The previous prime is 13912403. The next prime is 13912421. The reversal of 13912405 is 50421931.

It can be written as a sum of positive squares in 8 ways, for example, as 6195121 + 7717284 = 2489^2 + 2778^2 .

It is a cyclic number.

It is not a de Polignac number, because 13912405 - 2¹ = 13912403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13912405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13912403) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11991 + ... + 13099.

It is an arithmetic number, because the mean of its divisors is an integer number (1130535).

Almost surely, 2^13912405 is an apocalyptic number.

It is an amenable number.

13912405 is a deficient number, since it is larger than the sum of its proper divisors (4176155).

13912405 is a wasteful number, since it uses less digits than its factorization.

13912405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 13912405 is about 3729.9336455224. The cubic root of 13912405 is about 240.5105162939.

It can be divided in two parts, 139 and 12405, that added together give a square (12544 = 112²).

The spelling of 13912405 in words is "thirteen million, nine hundred twelve thousand, four hundred five".