2671561 has 2 divisors, whose sum is σ = 2671562. Its totient is φ = 2671560.

The previous prime is 2671541. The next prime is 2671573. The reversal of 2671561 is 1651762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1392400 + 1279161 = 1180^2 + 1131^2 .

It is a cyclic number.

It is not a de Polignac number, because 2671561 - 2¹⁵ = 2638793 is a prime.

It is not a weakly prime, because it can be changed into another prime (2671541) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1335780 + 1335781.

It is an arithmetic number, because the mean of its divisors is an integer number (1335781).

2^2671561 is an apocalyptic number.

It is an amenable number.

2671561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2671561 is an equidigital number, since it uses as much as digits as its factorization.

2671561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 28.

The square root of 2671561 is about 1634.4910522851. The cubic root of 2671561 is about 138.7570415494.

The spelling of 2671561 in words is "two million, six hundred seventy-one thousand, five hundred sixty-one".