4891491 has 12 divisors (see below), whose sum is σ = 7707960. Its totient is φ = 2964480.

The previous prime is 4891489. The next prime is 4891499. The reversal of 4891491 is 1941984.

It is not a de Polignac number, because 4891491 - 2¹ = 4891489 is a prime.

4891491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4891499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24606 + ... + 24803.

It is an arithmetic number, because the mean of its divisors is an integer number (642330).

Almost surely, 2^4891491 is an apocalyptic number.

4891491 is a deficient number, since it is larger than the sum of its proper divisors (2816469).

4891491 is a wasteful number, since it uses less digits than its factorization.

4891491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49426 (or 49423 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 4891491 is about 2211.6715398087. The cubic root of 4891491 is about 169.7515517278.

The spelling of 4891491 in words is "four million, eight hundred ninety-one thousand, four hundred ninety-one".