2506518 has 64 divisors (see below), whose sum is σ = 6720000. Its totient is φ = 676512.

The previous prime is 2506501. The next prime is 2506523. The reversal of 2506518 is 8156052.

2506518 is a `hidden beast` number, since 2 + 5 + 0 + 651 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2506491 and 2506500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7008 + ... + 7356.

It is an arithmetic number, because the mean of its divisors is an integer number (105000).

2^2506518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2506518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3360000).

2506518 is an abundant number, since it is smaller than the sum of its proper divisors (4213482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2506518 is a wasteful number, since it uses less digits than its factorization.

2506518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2506518 is about 1583.1986609393. The cubic root of 2506518 is about 135.8387289646.

The spelling of 2506518 in words is "two million, five hundred six thousand, five hundred eighteen".