13445641 has 6 divisors (see below), whose sum is σ = 14779226. Its totient is φ = 12223200.

The previous prime is 13445633. The next prime is 13445659. The reversal of 13445641 is 14654431.

It can be written as a sum of positive squares in only one way, i.e., 11703241 + 1742400 = 3421^2 + 1320^2 .

It is not a de Polignac number, because 13445641 - 2³ = 13445633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13445741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55440 + ... + 55681.

Almost surely, 2^13445641 is an apocalyptic number.

13445641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13445641 is a deficient number, since it is larger than the sum of its proper divisors (1333585).

13445641 is a wasteful number, since it uses less digits than its factorization.

13445641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111143 (or 111132 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 13445641 is about 3666.8298297030. The cubic root of 13445641 is about 237.7901370131.

The spelling of 13445641 in words is "thirteen million, four hundred forty-five thousand, six hundred forty-one".