13420641 has 16 divisors (see below), whose sum is σ = 19381376. Its totient is φ = 8211456.

The previous prime is 13420637. The next prime is 13420643. The reversal of 13420641 is 14602431.

13420641 = T₄₆ + T₄₇ + ... + T₄₃₁.

It is not a de Polignac number, because 13420641 - 2² = 13420637 is a prime.

It is a super-2 number, since 2×13420641² = 360227209701762, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13420643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6636 + ... + 8418.

It is an arithmetic number, because the mean of its divisors is an integer number (1211336).

Almost surely, 2^13420641 is an apocalyptic number.

It is an amenable number.

13420641 is a deficient number, since it is larger than the sum of its proper divisors (5960735).

13420641 is a wasteful number, since it uses less digits than its factorization.

13420641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 13420641 is about 3663.4193044204. The cubic root of 13420641 is about 237.6426681129.

The spelling of 13420641 in words is "thirteen million, four hundred twenty thousand, six hundred forty-one".