123284561 has 8 divisors (see below), whose sum is σ = 131340384. Its totient is φ = 115318080.

The previous prime is 123284543. The next prime is 123284573. The reversal of 123284561 is 165482321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123284561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123280561) 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 7 ways as a sum of consecutive naturals, for example, 19475 + ... + 25016.

It is an arithmetic number, because the mean of its divisors is an integer number (16417548).

Almost surely, 2^123284561 is an apocalyptic number.

It is an amenable number.

123284561 is a deficient number, since it is larger than the sum of its proper divisors (8055823).

123284561 is a wasteful number, since it uses less digits than its factorization.

123284561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44671.

The product of its digits is 11520, while the sum is 32.

The square root of 123284561 is about 11103.3580956394. The cubic root of 123284561 is about 497.7022044473.

The spelling of 123284561 in words is "one hundred twenty-three million, two hundred eighty-four thousand, five hundred sixty-one".