2505309 has 8 divisors (see below), whose sum is σ = 3418272. Its totient is φ = 1631280.

The previous prime is 2505301. The next prime is 2505311. The reversal of 2505309 is 9035052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2505309 - 2³ = 2505301 is a prime.

2505309 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9582 + ... + 9839.

It is an arithmetic number, because the mean of its divisors is an integer number (427284).

2^2505309 is an apocalyptic number.

It is an amenable number.

2505309 is a deficient number, since it is larger than the sum of its proper divisors (912963).

2505309 is a wasteful number, since it uses less digits than its factorization.

2505309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19467.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 2505309 is about 1582.8167929359. The cubic root of 2505309 is about 135.8168851910.

The spelling of 2505309 in words is "two million, five hundred five thousand, three hundred nine".