13121494 has 12 divisors (see below), whose sum is σ = 20340612. Its totient is φ = 6348180.

The previous prime is 13121489. The next prime is 13121497. The reversal of 13121494 is 49412131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1492 + ... + 5335.

It is an arithmetic number, because the mean of its divisors is an integer number (1695051).

Almost surely, 2^13121494 is an apocalyptic number.

13121494 is a deficient number, since it is larger than the sum of its proper divisors (7219118).

13121494 is an equidigital number, since it uses as much as digits as its factorization.

13121494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6891 (or 6860 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 13121494 is about 3622.3602802593. The cubic root of 13121494 is about 235.8636936722.

The spelling of 13121494 in words is "thirteen million, one hundred twenty-one thousand, four hundred ninety-four".