124242161 has 2 divisors, whose sum is σ = 124242162. Its totient is φ = 124242160.

The previous prime is 124242143. The next prime is 124242169. The reversal of 124242161 is 161242421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119224561 + 5017600 = 10919^2 + 2240^2 .

It is a cyclic number.

It is not a de Polignac number, because 124242161 - 2²² = 120047857 is a prime.

It is a super-2 number, since 2×124242161² = 30872229139899842, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (124242169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62121080 + 62121081.

It is an arithmetic number, because the mean of its divisors is an integer number (62121081).

Almost surely, 2^124242161 is an apocalyptic number.

It is an amenable number.

124242161 is a deficient number, since it is larger than the sum of its proper divisors (1).

124242161 is an equidigital number, since it uses as much as digits as its factorization.

124242161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

The square root of 124242161 is about 11146.3967720515. The cubic root of 124242161 is about 498.9874990677.

Adding to 124242161 its reverse (161242421), we get a palindrome (285484582).

The spelling of 124242161 in words is "one hundred twenty-four million, two hundred forty-two thousand, one hundred sixty-one".