2495991 has 16 divisors (see below), whose sum is σ = 3564000. Its totient is φ = 1548288.

The previous prime is 2495981. The next prime is 2495993. The reversal of 2495991 is 1995942.

It is not a de Polignac number, because 2495991 - 2¹⁰ = 2494967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2495993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5335 + ... + 5783.

It is an arithmetic number, because the mean of its divisors is an integer number (222750).

2^2495991 is an apocalyptic number.

2495991 is a deficient number, since it is larger than the sum of its proper divisors (1068009).

2495991 is a wasteful number, since it uses less digits than its factorization.

2495991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578.

The product of its digits is 29160, while the sum is 39.

The square root of 2495991 is about 1579.8705643185. The cubic root of 2495991 is about 135.6482946814.

It can be divided in two parts, 2495 and 991, that added together give a triangular number (3486 = T₈₃).

The spelling of 2495991 in words is "two million, four hundred ninety-five thousand, nine hundred ninety-one".