2491489 has 32 divisors (see below), whose sum is σ = 3548160. Its totient is φ = 1684800.

The previous prime is 2491487. The next prime is 2491493. The reversal of 2491489 is 9841942.

It is a happy number.

It is not a de Polignac number, because 2491489 - 2¹ = 2491487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2491487) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 18954 + ... + 19084.

It is an arithmetic number, because the mean of its divisors is an integer number (110880).

2^2491489 is an apocalyptic number.

It is an amenable number.

2491489 is a deficient number, since it is larger than the sum of its proper divisors (1056671).

2491489 is a wasteful number, since it uses less digits than its factorization.

2491489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181.

The product of its digits is 20736, while the sum is 37.

The square root of 2491489 is about 1578.4451209972. The cubic root of 2491489 is about 135.5666896654.

Adding to 2491489 its product of digits (20736), we get a square (2512225 = 1585²).

The spelling of 2491489 in words is "two million, four hundred ninety-one thousand, four hundred eighty-nine".