13661451 has 6 divisors (see below), whose sum is σ = 19733220. Its totient is φ = 9107628.

The previous prime is 13661449. The next prime is 13661467. The reversal of 13661451 is 15416631.

It is not a de Polignac number, because 13661451 - 2¹ = 13661449 is a prime.

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 5 ways as a sum of consecutive naturals, for example, 758961 + ... + 758978.

It is an arithmetic number, because the mean of its divisors is an integer number (3288870).

Almost surely, 2^13661451 is an apocalyptic number.

13661451 is a deficient number, since it is larger than the sum of its proper divisors (6071769).

13661451 is a wasteful number, since it uses less digits than its factorization.

13661451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517945 (or 1517942 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 13661451 is about 3696.1400135817. The cubic root of 13661451 is about 239.0556116688.

The spelling of 13661451 in words is "thirteen million, six hundred sixty-one thousand, four hundred fifty-one".