123865481 has 2 divisors, whose sum is σ = 123865482. Its totient is φ = 123865480.

The previous prime is 123865477. The next prime is 123865487. The reversal of 123865481 is 184568321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123765625 + 99856 = 11125^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 123865481 - 2² = 123865477 is a prime.

It is a super-2 number, since 2×123865481² = 30685314766722722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123865487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61932740 + 61932741.

It is an arithmetic number, because the mean of its divisors is an integer number (61932741).

Almost surely, 2^123865481 is an apocalyptic number.

It is an amenable number.

123865481 is a deficient number, since it is larger than the sum of its proper divisors (1).

123865481 is an equidigital number, since it uses as much as digits as its factorization.

123865481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 38.

The square root of 123865481 is about 11129.4870052487. The cubic root of 123865481 is about 498.4827083093.

The spelling of 123865481 in words is "one hundred twenty-three million, eight hundred sixty-five thousand, four hundred eighty-one".