13607421 has 16 divisors (see below), whose sum is σ = 19046400. Its totient is φ = 8624880.

The previous prime is 13607417. The next prime is 13607423. The reversal of 13607421 is 12470631.

It is not a de Polignac number, because 13607421 - 2² = 13607417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13607391 and 13607400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13607423) 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, 13236 + ... + 14226.

It is an arithmetic number, because the mean of its divisors is an integer number (1190400).

Almost surely, 2^13607421 is an apocalyptic number.

It is an amenable number.

13607421 is a deficient number, since it is larger than the sum of its proper divisors (5438979).

13607421 is a wasteful number, since it uses less digits than its factorization.

13607421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 13607421 is about 3688.8237962798. The cubic root of 13607421 is about 238.7400463674.

It can be divided in two parts, 13607 and 421, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 13607421 in words is "thirteen million, six hundred seven thousand, four hundred twenty-one".