4991020 has 24 divisors (see below), whose sum is σ = 10655568. Its totient is φ = 1963200.

The previous prime is 4991011. The next prime is 4991029. The reversal of 4991020 is 201994.

4991020 = T₁₃₆ + T₁₃₇ + ... + T₃₁₈.

It is an interprime number because it is at equal distance from previous prime (4991011) and next prime (4991029).

It is not an unprimeable number, because it can be changed into a prime (4991029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 826 + ... + 3265.

It is an arithmetic number, because the mean of its divisors is an integer number (443982).

Almost surely, 2^4991020 is an apocalyptic number.

It is an amenable number.

4991020 is an abundant number, since it is smaller than the sum of its proper divisors (5664548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4991020 is a wasteful number, since it uses less digits than its factorization.

4991020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161 (or 4159 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 4991020 is about 2234.0590860584. The cubic root of 4991020 is about 170.8951627606.

The spelling of 4991020 in words is "four million, nine hundred ninety-one thousand, twenty".