124161391 has 2 divisors, whose sum is σ = 124161392. Its totient is φ = 124161390.

The previous prime is 124161379. The next prime is 124161419. The reversal of 124161391 is 193161421.

It is an a-pointer prime, because the next prime (124161419) can be obtained adding 124161391 to its sum of digits (28).

It is a weak prime.

It is an emirp because it is prime and its reverse (193161421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124161391 - 2¹⁵ = 124128623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124161341) 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, 62080695 + 62080696.

It is an arithmetic number, because the mean of its divisors is an integer number (62080696).

Almost surely, 2^124161391 is an apocalyptic number.

124161391 is a deficient number, since it is larger than the sum of its proper divisors (1).

124161391 is an equidigital number, since it uses as much as digits as its factorization.

124161391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The square root of 124161391 is about 11142.7730390599. The cubic root of 124161391 is about 498.8793448071.

The spelling of 124161391 in words is "one hundred twenty-four million, one hundred sixty-one thousand, three hundred ninety-one".