124845869 has 2 divisors, whose sum is σ = 124845870. Its totient is φ = 124845868.

The previous prime is 124845823. The next prime is 124845871. The reversal of 124845869 is 968548421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122988100 + 1857769 = 11090^2 + 1363^2 .

It is an emirp because it is prime and its reverse (968548421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124845869 - 2⁸ = 124845613 is a prime.

It is a super-2 number, since 2×124845869² = 31172982012730322, which contains 22 as substring.

Together with 124845871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124845269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62422934 + 62422935.

It is an arithmetic number, because the mean of its divisors is an integer number (62422935).

Almost surely, 2^124845869 is an apocalyptic number.

It is an amenable number.

124845869 is a deficient number, since it is larger than the sum of its proper divisors (1).

124845869 is an equidigital number, since it uses as much as digits as its factorization.

124845869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 47.

The square root of 124845869 is about 11173.4448134852. Note that the first 3 decimals coincide. The cubic root of 124845869 is about 499.7944074750.

The spelling of 124845869 in words is "one hundred twenty-four million, eight hundred forty-five thousand, eight hundred sixty-nine".