2657671 has 2 divisors, whose sum is σ = 2657672. Its totient is φ = 2657670.

The previous prime is 2657657. The next prime is 2657687. The reversal of 2657671 is 1767562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2657671 - 2⁹ = 2657159 is a prime.

2657671 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2657651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328835 + 1328836.

It is an arithmetic number, because the mean of its divisors is an integer number (1328836).

2^2657671 is an apocalyptic number.

2657671 is a deficient number, since it is larger than the sum of its proper divisors (1).

2657671 is an equidigital number, since it uses as much as digits as its factorization.

2657671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 34.

The square root of 2657671 is about 1630.2364859124. The cubic root of 2657671 is about 138.5161480301.

The spelling of 2657671 in words is "two million, six hundred fifty-seven thousand, six hundred seventy-one".