123563281 has 2 divisors, whose sum is σ = 123563282. Its totient is φ = 123563280.

The previous prime is 123563269. The next prime is 123563339. The reversal of 123563281 is 182365321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63345681 + 60217600 = 7959^2 + 7760^2 .

It is a cyclic number.

It is not a de Polignac number, because 123563281 - 2⁵ = 123563249 is a prime.

It is a super-2 number, since 2×123563281² = 30535768822969922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123563201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61781640 + 61781641.

It is an arithmetic number, because the mean of its divisors is an integer number (61781641).

Almost surely, 2^123563281 is an apocalyptic number.

It is an amenable number.

123563281 is a deficient number, since it is larger than the sum of its proper divisors (1).

123563281 is an equidigital number, since it uses as much as digits as its factorization.

123563281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 123563281 is about 11115.9021676155. The cubic root of 123563281 is about 498.0769881996.

It can be divided in two parts, 1235 and 63281, that added together give a square (64516 = 254²).

The spelling of 123563281 in words is "one hundred twenty-three million, five hundred sixty-three thousand, two hundred eighty-one".