2505999 has 8 divisors (see below), whose sum is σ = 3404592. Its totient is φ = 1639040.

The previous prime is 2505991. The next prime is 2506003. The reversal of 2505999 is 9995052.

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

It is a cyclic number.

It is not a de Polignac number, because 2505999 - 2³ = 2505991 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505991) 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, 7722 + ... + 8039.

It is an arithmetic number, because the mean of its divisors is an integer number (425574).

2^2505999 is an apocalyptic number.

2505999 is a deficient number, since it is larger than the sum of its proper divisors (898593).

2505999 is a wasteful number, since it uses less digits than its factorization.

2505999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15817.

The product of its (nonzero) digits is 36450, while the sum is 39.

The square root of 2505999 is about 1583.0347437754. The cubic root of 2505999 is about 135.8293527215.

The spelling of 2505999 in words is "two million, five hundred five thousand, nine hundred ninety-nine".