13707021 has 8 divisors (see below), whose sum is σ = 18447264. Its totient is φ = 9052400.

The previous prime is 13707017. The next prime is 13707073. The reversal of 13707021 is 12070731.

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 13707021 - 2² = 13707017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13707091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21030 + ... + 21671.

It is an arithmetic number, because the mean of its divisors is an integer number (2305908).

Almost surely, 2^13707021 is an apocalyptic number.

It is an amenable number.

13707021 is a deficient number, since it is larger than the sum of its proper divisors (4740243).

13707021 is a wasteful number, since it uses less digits than its factorization.

13707021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42811.

The product of its (nonzero) digits is 294, while the sum is 21.

The square root of 13707021 is about 3702.2994206304. The cubic root of 13707021 is about 239.3211196781.

Adding to 13707021 its reverse (12070731), we get a palindrome (25777752).

The spelling of 13707021 in words is "thirteen million, seven hundred seven thousand, twenty-one".