2639251 has 2 divisors, whose sum is σ = 2639252. Its totient is φ = 2639250.

The previous prime is 2639239. The next prime is 2639291. The reversal of 2639251 is 1529362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2639251 - 2¹⁹ = 2114963 is a prime.

It is not a weakly prime, because it can be changed into another prime (2639201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319625 + 1319626.

It is an arithmetic number, because the mean of its divisors is an integer number (1319626).

2^2639251 is an apocalyptic number.

2639251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2639251 is an equidigital number, since it uses as much as digits as its factorization.

2639251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 2639251 is about 1624.5771757599. The cubic root of 2639251 is about 138.1953928917.

The spelling of 2639251 in words is "two million, six hundred thirty-nine thousand, two hundred fifty-one".