12390491 has 8 divisors (see below), whose sum is σ = 13076640. Its totient is φ = 11716672.

The previous prime is 12390463. The next prime is 12390517. The reversal of 12390491 is 19409321.

It is a happy number.

12390491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12390491 - 2¹⁴ = 12374107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12390401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 980 + ... + 5073.

It is an arithmetic number, because the mean of its divisors is an integer number (1634580).

Almost surely, 2^12390491 is an apocalyptic number.

12390491 is a deficient number, since it is larger than the sum of its proper divisors (686149).

12390491 is an equidigital number, since it uses as much as digits as its factorization.

12390491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6165.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 12390491 is about 3520.0129261126. The cubic root of 12390491 is about 231.3997251953.

The spelling of 12390491 in words is "twelve million, three hundred ninety thousand, four hundred ninety-one".