2490161 has 2 divisors, whose sum is σ = 2490162. Its totient is φ = 2490160.

The previous prime is 2490157. The next prime is 2490209. The reversal of 2490161 is 1610942.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1366561 + 1123600 = 1169^2 + 1060^2 .

It is a cyclic number.

It is not a de Polignac number, because 2490161 - 2² = 2490157 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p₁₈₂₄₀₈ and since 2490161 and 182408 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2490101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245080 + 1245081.

It is an arithmetic number, because the mean of its divisors is an integer number (1245081).

2^2490161 is an apocalyptic number.

It is an amenable number.

2490161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2490161 is an equidigital number, since it uses as much as digits as its factorization.

2490161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2490161 is about 1578.0243977835. The cubic root of 2490161 is about 135.5425990433.

The spelling of 2490161 in words is "two million, four hundred ninety thousand, one hundred sixty-one".