2491506 has 64 divisors (see below), whose sum is σ = 6019200. Its totient is φ = 762048.

The previous prime is 2491499. The next prime is 2491519. The reversal of 2491506 is 6051942.

It is a super-3 number, since 3×2491506³ = 46398833992333746648, which contains 333 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2491506.

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, 57921 + ... + 57963.

It is an arithmetic number, because the mean of its divisors is an integer number (94050).

2^2491506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3009600).

2491506 is an abundant number, since it is smaller than the sum of its proper divisors (3527694).

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

2491506 is a wasteful number, since it uses less digits than its factorization.

2491506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 2491506 is about 1578.4505060343. The cubic root of 2491506 is about 135.5669979989.

The spelling of 2491506 in words is "two million, four hundred ninety-one thousand, five hundred six".