13520073 has 16 divisors (see below), whose sum is σ = 20658176. Its totient is φ = 7704720.

The previous prime is 13520071. The next prime is 13520081. The reversal of 13520073 is 37002531.

It is a happy number.

13520073 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13520073 - 2¹ = 13520071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13520071) 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, 10368 + ... + 11598.

It is an arithmetic number, because the mean of its divisors is an integer number (1291136).

Almost surely, 2^13520073 is an apocalyptic number.

It is an amenable number.

13520073 is a deficient number, since it is larger than the sum of its proper divisors (7138103).

13520073 is a wasteful number, since it uses less digits than its factorization.

13520073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 13520073 is about 3676.9651888480. The cubic root of 13520073 is about 238.2281138014.

The spelling of 13520073 in words is "thirteen million, five hundred twenty thousand, seventy-three".