123321137 has 8 divisors (see below), whose sum is σ = 127698600. Its totient is φ = 118952064.

The previous prime is 123321127. The next prime is 123321161. The reversal of 123321137 is 731123321.

It can be written as a sum of positive squares in 4 ways, for example, as 42393121 + 80928016 = 6511^2 + 8996^2 .

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-123321137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123321127) 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, 50693 + ... + 53069.

It is an arithmetic number, because the mean of its divisors is an integer number (15962325).

Almost surely, 2^123321137 is an apocalyptic number.

It is an amenable number.

123321137 is a deficient number, since it is larger than the sum of its proper divisors (4377463).

123321137 is a wasteful number, since it uses less digits than its factorization.

123321137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195.

The product of its digits is 756, while the sum is 23.

The square root of 123321137 is about 11105.0050427724. The cubic root of 123321137 is about 497.7514189251.

Adding to 123321137 its reverse (731123321), we get a palindrome (854444458).

The spelling of 123321137 in words is "one hundred twenty-three million, three hundred twenty-one thousand, one hundred thirty-seven".