13621007 has 4 divisors (see below), whose sum is σ = 13633320. Its totient is φ = 13608696.

The previous prime is 13621001. The next prime is 13621009. The reversal of 13621007 is 70012631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13621007 - 2¹⁶ = 13555471 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13621007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13621001) 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, 4313 + ... + 6770.

It is an arithmetic number, because the mean of its divisors is an integer number (3408330).

Almost surely, 2^13621007 is an apocalyptic number.

13621007 is a deficient number, since it is larger than the sum of its proper divisors (12313).

13621007 is a wasteful number, since it uses less digits than its factorization.

13621007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12312.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 13621007 is about 3690.6648452548. The cubic root of 13621007 is about 238.8194746783.

Adding to 13621007 its reverse (70012631), we get a palindrome (83633638).

The spelling of 13621007 in words is "thirteen million, six hundred twenty-one thousand, seven".