123202561 has 8 divisors (see below), whose sum is σ = 126129600. Its totient is φ = 120303600.

The previous prime is 123202549. The next prime is 123202567. The reversal of 123202561 is 165202321.

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 123202561 - 2⁵ = 123202529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123202567) 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, 1995 + ... + 15823.

It is an arithmetic number, because the mean of its divisors is an integer number (15766200).

Almost surely, 2^123202561 is an apocalyptic number.

It is an amenable number.

123202561 is a deficient number, since it is larger than the sum of its proper divisors (2927039).

123202561 is a wasteful number, since it uses less digits than its factorization.

123202561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14039.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 123202561 is about 11099.6649048519. The cubic root of 123202561 is about 497.5918347679.

Adding to 123202561 its reverse (165202321), we get a palindrome (288404882).

The spelling of 123202561 in words is "one hundred twenty-three million, two hundred two thousand, five hundred sixty-one".