2506689 has 24 divisors (see below), whose sum is σ = 3875040. Its totient is φ = 1556928.

The previous prime is 2506687. The next prime is 2506697. The reversal of 2506689 is 9866052.

It is not a de Polignac number, because 2506689 - 2¹ = 2506687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2506681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18229 + ... + 18365.

It is an arithmetic number, because the mean of its divisors is an integer number (161460).

2^2506689 is an apocalyptic number.

It is an amenable number.

2506689 is a deficient number, since it is larger than the sum of its proper divisors (1368351).

2506689 is a wasteful number, since it uses less digits than its factorization.

2506689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 2506689 is about 1583.2526646117. The cubic root of 2506689 is about 135.8418179636.

The spelling of 2506689 in words is "two million, five hundred six thousand, six hundred eighty-nine".