14042509 has 16 divisors (see below), whose sum is σ = 15649200. Its totient is φ = 12519936.

The previous prime is 14042503. The next prime is 14042537. The reversal of 14042509 is 90524041.

14042509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2500 + 14040009 = 50^2 + 3747^2 .

It is not a de Polignac number, because 14042509 - 2⁹ = 14041997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14042503) 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, 61207 + ... + 61435.

It is an arithmetic number, because the mean of its divisors is an integer number (978075).

Almost surely, 2^14042509 is an apocalyptic number.

It is an amenable number.

14042509 is a deficient number, since it is larger than the sum of its proper divisors (1606691).

14042509 is a wasteful number, since it uses less digits than its factorization.

14042509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 14042509 is about 3747.3335853644. Note that the first 3 decimals coincide. The cubic root of 14042509 is about 241.2579150311.

The spelling of 14042509 in words is "fourteen million, forty-two thousand, five hundred nine".