2545671 has 4 divisors (see below), whose sum is σ = 3394232. Its totient is φ = 1697112.

The previous prime is 2545657. The next prime is 2545679. The reversal of 2545671 is 1765452.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2545671 - 2⁹ = 2545159 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424276 + ... + 424281.

It is an arithmetic number, because the mean of its divisors is an integer number (848558).

2^2545671 is an apocalyptic number.

2545671 is a deficient number, since it is larger than the sum of its proper divisors (848561).

2545671 is an equidigital number, since it uses as much as digits as its factorization.

2545671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848560.

The product of its digits is 8400, while the sum is 30.

The square root of 2545671 is about 1595.5159040260. The cubic root of 2545671 is about 136.5423663256.

The spelling of 2545671 in words is "two million, five hundred forty-five thousand, six hundred seventy-one".