13621497 has 16 divisors (see below), whose sum is σ = 19396608. Its totient is φ = 8482320.

The previous prime is 13621481. The next prime is 13621523. The reversal of 13621497 is 79412631.

It is not a de Polignac number, because 13621497 - 2⁴ = 13621481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13621427) 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, 672 + ... + 5262.

It is an arithmetic number, because the mean of its divisors is an integer number (1212288).

Almost surely, 2^13621497 is an apocalyptic number.

It is an amenable number.

13621497 is a deficient number, since it is larger than the sum of its proper divisors (5775111).

13621497 is a wasteful number, since it uses less digits than its factorization.

13621497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4660.

The product of its digits is 9072, while the sum is 33.

The square root of 13621497 is about 3690.7312283611. The cubic root of 13621497 is about 238.8223383955.

The spelling of 13621497 in words is "thirteen million, six hundred twenty-one thousand, four hundred ninety-seven".