2491047 has 32 divisors (see below), whose sum is σ = 4085760. Its totient is φ = 1490400.

The previous prime is 2491043. The next prime is 2491063. The reversal of 2491047 is 7401942.

It is a happy number.

It is not a de Polignac number, because 2491047 - 2² = 2491043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2491047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16422 + ... + 16572.

It is an arithmetic number, because the mean of its divisors is an integer number (127680).

2^2491047 is an apocalyptic number.

2491047 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2491047 is a deficient number, since it is larger than the sum of its proper divisors (1594713).

2491047 is a wasteful number, since it uses less digits than its factorization.

2491047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 2491047 is about 1578.3051035842. The cubic root of 2491047 is about 135.5586725024.

Adding to 2491047 its reverse (7401942), we get a palindrome (9892989).

It can be divided in two parts, 249 and 1047, that added together give a 4-th power (1296 = 6⁴).

The spelling of 2491047 in words is "two million, four hundred ninety-one thousand, forty-seven".