2638161 has 6 divisors (see below), whose sum is σ = 3810690. Its totient is φ = 1758768.

The previous prime is 2638087. The next prime is 2638177. The reversal of 2638161 is 1618362.

It can be written as a sum of positive squares in only one way, i.e., 2461761 + 176400 = 1569^2 + 420^2 .

It is not a de Polignac number, because 2638161 - 2¹³ = 2629969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 146556 + ... + 146573.

It is an arithmetic number, because the mean of its divisors is an integer number (635115).

2^2638161 is an apocalyptic number.

It is an amenable number.

2638161 is a deficient number, since it is larger than the sum of its proper divisors (1172529).

2638161 is a wasteful number, since it uses less digits than its factorization.

2638161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293135 (or 293132 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2638161 is about 1624.2416692106. The cubic root of 2638161 is about 138.1763655591.

The spelling of 2638161 in words is "two million, six hundred thirty-eight thousand, one hundred sixty-one".