13402661 has 8 divisors (see below), whose sum is σ = 13768704. Its totient is φ = 13040080.

The previous prime is 13402651. The next prime is 13402673. The reversal of 13402661 is 16620431.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13402661 - 2¹⁰ = 13401637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13402601) 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, 8231 + ... + 9723.

It is an arithmetic number, because the mean of its divisors is an integer number (1721088).

Almost surely, 2^13402661 is an apocalyptic number.

It is an amenable number.

13402661 is a deficient number, since it is larger than the sum of its proper divisors (366043).

13402661 is a wasteful number, since it uses less digits than its factorization.

13402661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 13402661 is about 3660.9644904041. The cubic root of 13402661 is about 237.5364952227.

The spelling of 13402661 in words is "thirteen million, four hundred two thousand, six hundred sixty-one".