124942109 has 2 divisors, whose sum is σ = 124942110. Its totient is φ = 124942108.

The previous prime is 124942087. The next prime is 124942127. The reversal of 124942109 is 901249421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123698884 + 1243225 = 11122^2 + 1115^2 .

It is an emirp because it is prime and its reverse (901249421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124942109 - 2¹⁶ = 124876573 is a prime.

It is a super-2 number, since 2×124942109² = 31221061202735762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124942189) 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 as a sum of consecutive naturals, namely, 62471054 + 62471055.

It is an arithmetic number, because the mean of its divisors is an integer number (62471055).

Almost surely, 2^124942109 is an apocalyptic number.

It is an amenable number.

124942109 is a deficient number, since it is larger than the sum of its proper divisors (1).

124942109 is an equidigital number, since it uses as much as digits as its factorization.

124942109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 124942109 is about 11177.7506234484. The cubic root of 124942109 is about 499.9228000810.

The spelling of 124942109 in words is "one hundred twenty-four million, nine hundred forty-two thousand, one hundred nine".