654642123 has 16 divisors (see below), whose sum is σ = 911623680. Its totient is φ = 417078464.

The previous prime is 654642113. The next prime is 654642127. The reversal of 654642123 is 321246456.

It is a cyclic number.

It is not a de Polignac number, because 654642123 - 2¹⁷ = 654511051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (654642127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87415 + ... + 94607.

It is an arithmetic number, because the mean of its divisors is an integer number (56976480).

Almost surely, 2^654642123 is an apocalyptic number.

654642123 is a deficient number, since it is larger than the sum of its proper divisors (256981557).

654642123 is a wasteful number, since it uses less digits than its factorization.

654642123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8538.

The product of its digits is 34560, while the sum is 33.

The square root of 654642123 is about 25585.9751231021. The cubic root of 654642123 is about 868.2963635620.

Adding to 654642123 its reverse (321246456), we get a palindrome (975888579).

The spelling of 654642123 in words is "six hundred fifty-four million, six hundred forty-two thousand, one hundred twenty-three".