123153281 has 2 divisors, whose sum is σ = 123153282. Its totient is φ = 123153280.

The previous prime is 123153241. The next prime is 123153313. The reversal of 123153281 is 182351321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110586256 + 12567025 = 10516^2 + 3545^2 .

It is a cyclic number.

It is not a de Polignac number, because 123153281 - 2¹⁰ = 123152257 is a prime.

It is a super-2 number, since 2×123153281² = 30333461242129922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123153281.

It is not a weakly prime, because it can be changed into another prime (123153241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61576640 + 61576641.

It is an arithmetic number, because the mean of its divisors is an integer number (61576641).

Almost surely, 2^123153281 is an apocalyptic number.

It is an amenable number.

123153281 is a deficient number, since it is larger than the sum of its proper divisors (1).

123153281 is an equidigital number, since it uses as much as digits as its factorization.

123153281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 123153281 is about 11097.4447959879. Note that the first 3 decimals coincide. The cubic root of 123153281 is about 497.5254817213.

The spelling of 123153281 in words is "one hundred twenty-three million, one hundred fifty-three thousand, two hundred eighty-one".