2497391 has 8 divisors (see below), whose sum is σ = 2776704. Its totient is φ = 2230560.

The previous prime is 2497381. The next prime is 2497421. The reversal of 2497391 is 1937942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2497391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2497301) 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 7 ways as a sum of consecutive naturals, for example, 2696 + ... + 3501.

It is an arithmetic number, because the mean of its divisors is an integer number (347088).

2^2497391 is an apocalyptic number.

2497391 is a deficient number, since it is larger than the sum of its proper divisors (279313).

2497391 is a wasteful number, since it uses less digits than its factorization.

2497391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6241.

The product of its digits is 13608, while the sum is 35.

The square root of 2497391 is about 1580.3135764778. The cubic root of 2497391 is about 135.6736516261.

The spelling of 2497391 in words is "two million, four hundred ninety-seven thousand, three hundred ninety-one".