13702021 has 4 divisors (see below), whose sum is σ = 14423200. Its totient is φ = 12980844.

The previous prime is 13702001. The next prime is 13702057. The reversal of 13702021 is 12020731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13702021 - 2⁷ = 13701893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13701986 and 13702004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13702001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360561 + ... + 360598.

It is an arithmetic number, because the mean of its divisors is an integer number (3605800).

Almost surely, 2^13702021 is an apocalyptic number.

It is an amenable number.

13702021 is a deficient number, since it is larger than the sum of its proper divisors (721179).

13702021 is an equidigital number, since it uses as much as digits as its factorization.

13702021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721178.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 13702021 is about 3701.6241030121. The cubic root of 13702021 is about 239.2920165606.

Adding to 13702021 its reverse (12020731), we get a palindrome (25722752).

The spelling of 13702021 in words is "thirteen million, seven hundred two thousand, twenty-one".