2640271 has 2 divisors, whose sum is σ = 2640272. Its totient is φ = 2640270.

The previous prime is 2640251. The next prime is 2640289. The reversal of 2640271 is 1720462.

2640271 is nontrivially palindromic in base 9.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2640271 - 2⁹ = 2639759 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2640251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320135 + 1320136.

It is an arithmetic number, because the mean of its divisors is an integer number (1320136).

2^2640271 is an apocalyptic number.

2640271 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640271 is an equidigital number, since it uses as much as digits as its factorization.

2640271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 2640271 is about 1624.8910732723. The cubic root of 2640271 is about 138.2131935412.

The spelling of 2640271 in words is "two million, six hundred forty thousand, two hundred seventy-one".