654457 has 4 divisors (see below), whose sum is σ = 656640. Its totient is φ = 652276.

The previous prime is 654439. The next prime is 654491. The reversal of 654457 is 754456.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-654457 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654427) 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, 553 + ... + 1270.

It is an arithmetic number, because the mean of its divisors is an integer number (164160).

2⁶⁵⁴⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

654457 is a deficient number, since it is larger than the sum of its proper divisors (2183).

654457 is a wasteful number, since it uses less digits than its factorization.

654457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182.

The product of its digits is 16800, while the sum is 31.

The square root of 654457 is about 808.9851667367. The cubic root of 654457 is about 86.8214508771.

Subtracting 654457 from its reverse (754456), we obtain a palindrome (99999).

It can be divided in two parts, 654 and 457, that added together give a palindrome (1111).

The spelling of 654457 in words is "six hundred fifty-four thousand, four hundred fifty-seven".