13747021 has 8 divisors (see below), whose sum is σ = 14061600. Its totient is φ = 13435440.

The previous prime is 13747007. The next prime is 13747049. The reversal of 13747021 is 12074731.

It is a happy number.

13747021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13747021 - 2⁵ = 13746989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13747001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10290 + ... + 11548.

It is an arithmetic number, because the mean of its divisors is an integer number (1757700).

Almost surely, 2^13747021 is an apocalyptic number.

It is an amenable number.

13747021 is a deficient number, since it is larger than the sum of its proper divisors (314579).

13747021 is a wasteful number, since it uses less digits than its factorization.

13747021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 13747021 is about 3707.6975335105. The cubic root of 13747021 is about 239.5536902220.

The spelling of 13747021 in words is "thirteen million, seven hundred forty-seven thousand, twenty-one".