654261 has 4 divisors (see below), whose sum is σ = 872352. Its totient is φ = 436172.

The previous prime is 654257. The next prime is 654293. The reversal of 654261 is 162456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 654261 - 2² = 654257 is a prime.

It is a super-2 number, since 2×654261² = 856114912242, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654221) 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, 109041 + ... + 109046.

It is an arithmetic number, because the mean of its divisors is an integer number (218088).

2⁶⁵⁴²⁶¹ is an apocalyptic number.

It is an amenable number.

654261 is a deficient number, since it is larger than the sum of its proper divisors (218091).

654261 is a wasteful number, since it uses less digits than its factorization.

654261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218090.

The product of its digits is 1440, while the sum is 24.

The square root of 654261 is about 808.8640182379. The cubic root of 654261 is about 86.8127827734.

The spelling of 654261 in words is "six hundred fifty-four thousand, two hundred sixty-one".