654761 has 4 divisors (see below), whose sum is σ = 670032. Its totient is φ = 639492.

The previous prime is 654749. The next prime is 654767. The reversal of 654761 is 167456.

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 654761 - 2⁶ = 654697 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7571 + ... + 7656.

It is an arithmetic number, because the mean of its divisors is an integer number (167508).

2⁶⁵⁴⁷⁶¹ is an apocalyptic number.

It is an amenable number.

654761 is a deficient number, since it is larger than the sum of its proper divisors (15271).

654761 is a wasteful number, since it uses less digits than its factorization.

654761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15270.

The product of its digits is 5040, while the sum is 29.

The square root of 654761 is about 809.1730346471. The cubic root of 654761 is about 86.8348918597.

The spelling of 654761 in words is "six hundred fifty-four thousand, seven hundred sixty-one".