123554521 has 8 divisors (see below), whose sum is σ = 130996224. Its totient is φ = 116132160.

The previous prime is 123554503. The next prime is 123554527. The reversal of 123554521 is 125455321.

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

It is a cyclic number.

It is not a de Polignac number, because 123554521 - 2⁷ = 123554393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123554521.

It is not an unprimeable number, because it can be changed into a prime (123554527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9576 + ... + 18406.

It is an arithmetic number, because the mean of its divisors is an integer number (16374528).

Almost surely, 2^123554521 is an apocalyptic number.

It is an amenable number.

123554521 is a deficient number, since it is larger than the sum of its proper divisors (7441703).

123554521 is an equidigital number, since it uses as much as digits as its factorization.

123554521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9671.

The product of its digits is 6000, while the sum is 28.

The square root of 123554521 is about 11115.5081305355. The cubic root of 123554521 is about 498.0652175573.

The spelling of 123554521 in words is "one hundred twenty-three million, five hundred fifty-four thousand, five hundred twenty-one".