124229981 has 4 divisors (see below), whose sum is σ = 124772700. Its totient is φ = 123687264.

The previous prime is 124229951. The next prime is 124229983. The reversal of 124229981 is 189922421.

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 92813956 + 31416025 = 9634^2 + 5605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124229981 is a prime.

It is a super-2 number, since 2×124229981² = 30866176358520722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124229983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271016 + ... + 271473.

It is an arithmetic number, because the mean of its divisors is an integer number (31193175).

Almost surely, 2^124229981 is an apocalyptic number.

It is an amenable number.

124229981 is a deficient number, since it is larger than the sum of its proper divisors (542719).

124229981 is an equidigital number, since it uses as much as digits as its factorization.

124229981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542718.

The product of its digits is 20736, while the sum is 38.

The square root of 124229981 is about 11145.8503937564. The cubic root of 124229981 is about 498.9711925624.

The spelling of 124229981 in words is "one hundred twenty-four million, two hundred twenty-nine thousand, nine hundred eighty-one".