13422661 has 4 divisors (see below), whose sum is σ = 15340192. Its totient is φ = 11505132.

The previous prime is 13422649. The next prime is 13422667. The reversal of 13422661 is 16622431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16622431 = 7 ⋅2374633.

It is a cyclic number.

It is not a de Polignac number, because 13422661 - 2⁷ = 13422533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13422667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 958755 + ... + 958768.

It is an arithmetic number, because the mean of its divisors is an integer number (3835048).

Almost surely, 2^13422661 is an apocalyptic number.

It is an amenable number.

13422661 is a deficient number, since it is larger than the sum of its proper divisors (1917531).

13422661 is an equidigital number, since it uses as much as digits as its factorization.

13422661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917530.

The product of its digits is 1728, while the sum is 25.

The square root of 13422661 is about 3663.6949927635. The cubic root of 13422661 is about 237.6545903976.

The spelling of 13422661 in words is "thirteen million, four hundred twenty-two thousand, six hundred sixty-one".