2491555 has 16 divisors (see below), whose sum is σ = 3304800. Its totient is φ = 1788160.

The previous prime is 2491553. The next prime is 2491589. The reversal of 2491555 is 5551942.

It is not a de Polignac number, because 2491555 - 2¹ = 2491553 is a prime.

2491555 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2491553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4641 + ... + 5149.

It is an arithmetic number, because the mean of its divisors is an integer number (206550).

2^2491555 is an apocalyptic number.

2491555 is a deficient number, since it is larger than the sum of its proper divisors (813245).

2491555 is a wasteful number, since it uses less digits than its factorization.

2491555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614.

The product of its digits is 9000, while the sum is 31.

The square root of 2491555 is about 1578.4660275090. The cubic root of 2491555 is about 135.5678867170.

The spelling of 2491555 in words is "two million, four hundred ninety-one thousand, five hundred fifty-five".