654971 has 4 divisors (see below), whose sum is σ = 683472. Its totient is φ = 626472.

The previous prime is 654967. The next prime is 654991. The reversal of 654971 is 179456.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 654971 - 2² = 654967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654931) 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, 14216 + ... + 14261.

It is an arithmetic number, because the mean of its divisors is an integer number (170868).

2⁶⁵⁴⁹⁷¹ is an apocalyptic number.

654971 is a deficient number, since it is larger than the sum of its proper divisors (28501).

654971 is a wasteful number, since it uses less digits than its factorization.

654971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28500.

The product of its digits is 7560, while the sum is 32.

The square root of 654971 is about 809.3027863538. The cubic root of 654971 is about 86.8441743196.

The spelling of 654971 in words is "six hundred fifty-four thousand, nine hundred seventy-one".