4540991 has 16 divisors (see below), whose sum is σ = 5644800. Its totient is φ = 3557088.

The previous prime is 4540979. The next prime is 4540993. The reversal of 4540991 is 1990454.

It is a cyclic number.

It is not a de Polignac number, because 4540991 - 2⁶ = 4540927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4540993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12470 + ... + 12828.

It is an arithmetic number, because the mean of its divisors is an integer number (352800).

Almost surely, 2^4540991 is an apocalyptic number.

4540991 is a deficient number, since it is larger than the sum of its proper divisors (1103809).

4540991 is a wasteful number, since it uses less digits than its factorization.

4540991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 4540991 is about 2130.9601122499. The cubic root of 4540991 is about 165.5961416909.

The spelling of 4540991 in words is "four million, five hundred forty thousand, nine hundred ninety-one".