2491530 has 32 divisors (see below), whose sum is σ = 6096384. Its totient is φ = 651456.

The previous prime is 2491523. The next prime is 2491547. The reversal of 2491530 is 351942.

It is a self number, because there is not a number n which added to its sum of digits gives 2491530.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 807 + ... + 2373.

It is an arithmetic number, because the mean of its divisors is an integer number (190512).

2^2491530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3048192).

2491530 is an abundant number, since it is smaller than the sum of its proper divisors (3604854).

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

2491530 is a wasteful number, since it uses less digits than its factorization.

2491530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 2491530 is about 1578.4581084083. The cubic root of 2491530 is about 135.5674332909.

The spelling of 2491530 in words is "two million, four hundred ninety-one thousand, five hundred thirty".