4990161 has 24 divisors (see below), whose sum is σ = 7469280. Its totient is φ = 2960320.

The previous prime is 4990157. The next prime is 4990177. The reversal of 4990161 is 1610994.

It is not a de Polignac number, because 4990161 - 2² = 4990157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4990121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21301 + ... + 21533.

It is an arithmetic number, because the mean of its divisors is an integer number (311220).

Almost surely, 2^4990161 is an apocalyptic number.

It is an amenable number.

4990161 is a deficient number, since it is larger than the sum of its proper divisors (2479119).

4990161 is a wasteful number, since it uses less digits than its factorization.

4990161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 4990161 is about 2233.8668268274. The cubic root of 4990161 is about 170.8853579934.

It can be divided in two parts, 4990 and 161, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 4990161 in words is "four million, nine hundred ninety thousand, one hundred sixty-one".