654321072 has 20 divisors (see below), whose sum is σ = 1690329560. Its totient is φ = 218107008.

The previous prime is 654321071. The next prime is 654321077. The reversal of 654321072 is 270123456.

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

It is not an unprimeable number, because it can be changed into a prime (654321071) 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, 6815797 + ... + 6815892.

It is an arithmetic number, because the mean of its divisors is an integer number (84516478).

Almost surely, 2^654321072 is an apocalyptic number.

It is an amenable number.

654321072 is an abundant number, since it is smaller than the sum of its proper divisors (1036008488).

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

654321072 is a wasteful number, since it uses less digits than its factorization.

654321072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13631700 (or 13631694 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 654321072 is about 25579.7003891758. The cubic root of 654321072 is about 868.1543964273.

The spelling of 654321072 in words is "six hundred fifty-four million, three hundred twenty-one thousand, seventy-two".