2491907 has 8 divisors (see below), whose sum is σ = 2861760. Its totient is φ = 2145960.

The previous prime is 2491903. The next prime is 2491933. The reversal of 2491907 is 7091942.

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

It is a cyclic number.

It is not a de Polignac number, because 2491907 - 2² = 2491903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2491903) 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 7 ways as a sum of consecutive naturals, for example, 5753 + ... + 6170.

It is an arithmetic number, because the mean of its divisors is an integer number (357720).

2^2491907 is an apocalyptic number.

2491907 is a deficient number, since it is larger than the sum of its proper divisors (369853).

2491907 is a wasteful number, since it uses less digits than its factorization.

2491907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11953.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 2491907 is about 1578.5775242287. The cubic root of 2491907 is about 135.5742706351.

The spelling of 2491907 in words is "two million, four hundred ninety-one thousand, nine hundred seven".