13661492 has 24 divisors (see below), whose sum is σ = 26237736. Its totient is φ = 6185088.

The previous prime is 13661491. The next prime is 13661497. The reversal of 13661492 is 29416631.

It can be written as a sum of positive squares in 4 ways, for example, as 3189796 + 10471696 = 1786^2 + 3236^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13661491) 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 7 ways as a sum of consecutive naturals, for example, 278 + ... + 5234.

It is an arithmetic number, because the mean of its divisors is an integer number (1093239).

Almost surely, 2^13661492 is an apocalyptic number.

It is an amenable number.

13661492 is a deficient number, since it is larger than the sum of its proper divisors (12576244).

13661492 is a wasteful number, since it uses less digits than its factorization.

13661492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027 (or 5025 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 13661492 is about 3696.1455599043. The cubic root of 13661492 is about 239.0558508154.

The spelling of 13661492 in words is "thirteen million, six hundred sixty-one thousand, four hundred ninety-two".