654571 has 2 divisors, whose sum is σ = 654572. Its totient is φ = 654570.

The previous prime is 654553. The next prime is 654587. The reversal of 654571 is 175456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 654571 - 2⁵ = 654539 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (654541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327285 + 327286.

It is an arithmetic number, because the mean of its divisors is an integer number (327286).

2⁶⁵⁴⁵⁷¹ is an apocalyptic number.

654571 is a deficient number, since it is larger than the sum of its proper divisors (1).

654571 is an equidigital number, since it uses as much as digits as its factorization.

654571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 28.

The square root of 654571 is about 809.0556223153. The cubic root of 654571 is about 86.8264917333.

It can be divided in two parts, 654 and 571, that added together give a triangular number (1225 = T₄₉).

The spelling of 654571 in words is "six hundred fifty-four thousand, five hundred seventy-one".