2049161 has 2 divisors, whose sum is σ = 2049162. Its totient is φ = 2049160.

The previous prime is 2049149. The next prime is 2049167. The reversal of 2049161 is 1619402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2016400 + 32761 = 1420^2 + 181^2 .

It is a cyclic number.

It is not a de Polignac number, because 2049161 - 2¹⁴ = 2032777 is a prime.

It is a Chen prime.

It is a nialpdrome in base 8.

It is not a weakly prime, because it can be changed into another prime (2049167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1024580 + 1024581.

It is an arithmetic number, because the mean of its divisors is an integer number (1024581).

2^2049161 is an apocalyptic number.

It is an amenable number.

2049161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2049161 is an equidigital number, since it uses as much as digits as its factorization.

2049161 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 2049161 is about 1431.4890848344. The cubic root of 2049161 is about 127.0160766636.

The spelling of 2049161 in words is "two million, forty-nine thousand, one hundred sixty-one".