12491406 has 12 divisors (see below), whose sum is σ = 27064752. Its totient is φ = 4163796.

The previous prime is 12491399. The next prime is 12491443. The reversal of 12491406 is 60419421.

It is a self number, because there is not a number n which added to its sum of digits gives 12491406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 346966 + ... + 347001.

It is an arithmetic number, because the mean of its divisors is an integer number (2255396).

Almost surely, 2^12491406 is an apocalyptic number.

12491406 is an abundant number, since it is smaller than the sum of its proper divisors (14573346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12491406 is a wasteful number, since it uses less digits than its factorization.

12491406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693975 (or 693972 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 12491406 is about 3534.3183218267. The cubic root of 12491406 is about 232.0262430678.

The spelling of 12491406 in words is "twelve million, four hundred ninety-one thousand, four hundred six".