124065281 has 4 divisors (see below), whose sum is σ = 124695252. Its totient is φ = 123435312.

The previous prime is 124065239. The next prime is 124065287. The reversal of 124065281 is 182560421.

124065281 = 353² + 354² + ... + 746².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119159056 + 4906225 = 10916^2 + 2215^2 .

It is a cyclic number.

It is not a de Polignac number, because 124065281 - 2¹⁰ = 124064257 is a prime.

It is a super-2 number, since 2×124065281² = 30784387899217922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (124065287) 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 in 3 ways as a sum of consecutive naturals, for example, 314690 + ... + 315083.

It is an arithmetic number, because the mean of its divisors is an integer number (31173813).

Almost surely, 2^124065281 is an apocalyptic number.

It is an amenable number.

124065281 is a deficient number, since it is larger than the sum of its proper divisors (629971).

124065281 is an equidigital number, since it uses as much as digits as its factorization.

124065281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629970.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 124065281 is about 11138.4595434019. The cubic root of 124065281 is about 498.7505885425.

The spelling of 124065281 in words is "one hundred twenty-four million, sixty-five thousand, two hundred eighty-one".