654654 has 64 divisors (see below), whose sum is σ = 1774080. Its totient is φ = 155520.

The previous prime is 654629. The next prime is 654671. The reversal of 654654 is 456456.

It is a congruent number.

It is an unprimeable number.

654654 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is an upside-down number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5952 + ... + 6060.

It is an arithmetic number, because the mean of its divisors is an integer number (27720).

2⁶⁵⁴⁶⁵⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (887040).

654654 is an abundant number, since it is smaller than the sum of its proper divisors (1119426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

654654 is a wasteful number, since it uses less digits than its factorization.

654654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145.

The product of its digits is 14400, while the sum is 30.

The square root of 654654 is about 809.1069150613. The cubic root of 654654 is about 86.8301614621.

The spelling of 654654 in words is "six hundred fifty-four thousand, six hundred fifty-four".