2545891 has 2 divisors, whose sum is σ = 2545892. Its totient is φ = 2545890.

The previous prime is 2545889. The next prime is 2545919. The reversal of 2545891 is 1985452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2545891 - 2¹ = 2545889 is a prime.

Together with 2545889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2545811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272945 + 1272946.

It is an arithmetic number, because the mean of its divisors is an integer number (1272946).

2^2545891 is an apocalyptic number.

2545891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2545891 is an equidigital number, since it uses as much as digits as its factorization.

2545891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 34.

The square root of 2545891 is about 1595.5848457541. The cubic root of 2545891 is about 136.5462995984.

The spelling of 2545891 in words is "two million, five hundred forty-five thousand, eight hundred ninety-one".