123054521 has 4 divisors (see below), whose sum is σ = 123156852. Its totient is φ = 122952192.

The previous prime is 123054509. The next prime is 123054527. The reversal of 123054521 is 125450321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15642025 + 107412496 = 3955^2 + 10364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123054521 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123054527) 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, 49340 + ... + 51773.

It is an arithmetic number, because the mean of its divisors is an integer number (30789213).

Almost surely, 2^123054521 is an apocalyptic number.

It is an amenable number.

123054521 is a deficient number, since it is larger than the sum of its proper divisors (102331).

123054521 is a wasteful number, since it uses less digits than its factorization.

123054521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102330.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 123054521 is about 11092.9942305944. The cubic root of 123054521 is about 497.3924530370.

The spelling of 123054521 in words is "one hundred twenty-three million, fifty-four thousand, five hundred twenty-one".