4991506 has 32 divisors (see below), whose sum is σ = 8926848. Its totient is φ = 2069760.

The previous prime is 4991491. The next prime is 4991507. The reversal of 4991506 is 6051994.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (4991507) 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, 9921 + ... + 10411.

It is an arithmetic number, because the mean of its divisors is an integer number (278964).

Almost surely, 2^4991506 is an apocalyptic number.

4991506 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

4991506 is a deficient number, since it is larger than the sum of its proper divisors (3935342).

4991506 is a wasteful number, since it uses less digits than its factorization.

4991506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 4991506 is about 2234.1678540342. The cubic root of 4991506 is about 170.9007095462.

The spelling of 4991506 in words is "four million, nine hundred ninety-one thousand, five hundred six".