2491366 has 4 divisors (see below), whose sum is σ = 3737052. Its totient is φ = 1245682.

The previous prime is 2491351. The next prime is 2491369. The reversal of 2491366 is 6631942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6631942 = 2 ⋅3315971.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622840 + ... + 622843.

It is an arithmetic number, because the mean of its divisors is an integer number (934263).

2^2491366 is an apocalyptic number.

2491366 is a deficient number, since it is larger than the sum of its proper divisors (1245686).

2491366 is a wasteful number, since it uses less digits than its factorization.

2491366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245685.

The product of its digits is 7776, while the sum is 31.

The square root of 2491366 is about 1578.4061581228. The cubic root of 2491366 is about 135.5644587402.

The spelling of 2491366 in words is "two million, four hundred ninety-one thousand, three hundred sixty-six".