2491017 has 4 divisors (see below), whose sum is σ = 3321360. Its totient is φ = 1660676.

The previous prime is 2491009. The next prime is 2491031. The reversal of 2491017 is 7101942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2491017 - 2³ = 2491009 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2491007) 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 3 ways as a sum of consecutive naturals, for example, 415167 + ... + 415172.

It is an arithmetic number, because the mean of its divisors is an integer number (830340).

2^2491017 is an apocalyptic number.

It is an amenable number.

2491017 is a deficient number, since it is larger than the sum of its proper divisors (830343).

2491017 is an equidigital number, since it uses as much as digits as its factorization.

2491017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830342.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 2491017 is about 1578.2955996897. The cubic root of 2491017 is about 135.5581283167.

Adding to 2491017 its reverse (7101942), we get a palindrome (9592959).

The spelling of 2491017 in words is "two million, four hundred ninety-one thousand, seventeen".