13621445 has 8 divisors (see below), whose sum is σ = 16909560. Its totient is φ = 10521280.

The previous prime is 13621429. The next prime is 13621453. The reversal of 13621445 is 54412631.

It can be written as a sum of positive squares in 4 ways, for example, as 538756 + 13082689 = 734^2 + 3617^2 .

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

It is not a de Polignac number, because 13621445 - 2⁴ = 13621429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46826 + ... + 47115.

It is an arithmetic number, because the mean of its divisors is an integer number (2113695).

Almost surely, 2^13621445 is an apocalyptic number.

It is an amenable number.

13621445 is a deficient number, since it is larger than the sum of its proper divisors (3288115).

13621445 is an equidigital number, since it uses as much as digits as its factorization.

13621445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93975.

The product of its digits is 2880, while the sum is 26.

The square root of 13621445 is about 3690.7241836799. The cubic root of 13621445 is about 238.8220344941.

The spelling of 13621445 in words is "thirteen million, six hundred twenty-one thousand, four hundred forty-five".