123258561 has 8 divisors (see below), whose sum is σ = 164546784. Its totient is φ = 82071360.

The previous prime is 123258557. The next prime is 123258571. The reversal of 123258561 is 165852321.

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

It is not a de Polignac number, because 123258561 - 2² = 123258557 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123258571) 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, 22360 + ... + 27321.

It is an arithmetic number, because the mean of its divisors is an integer number (20568348).

Almost surely, 2^123258561 is an apocalyptic number.

It is an amenable number.

123258561 is a deficient number, since it is larger than the sum of its proper divisors (41288223).

123258561 is an equidigital number, since it uses as much as digits as its factorization.

123258561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50511.

The product of its digits is 14400, while the sum is 33.

The square root of 123258561 is about 11102.1872169406. The cubic root of 123258561 is about 497.6672144831.

The spelling of 123258561 in words is "one hundred twenty-three million, two hundred fifty-eight thousand, five hundred sixty-one".