124545581 has 2 divisors, whose sum is σ = 124545582. Its totient is φ = 124545580.

The previous prime is 124545527. The next prime is 124545583. The reversal of 124545581 is 185545421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124434025 + 111556 = 11155^2 + 334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124545581 is a prime.

It is a super-2 number, since 2×124545581² = 31023203493255122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 124545583, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124545583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62272790 + 62272791.

It is an arithmetic number, because the mean of its divisors is an integer number (62272791).

Almost surely, 2^124545581 is an apocalyptic number.

It is an amenable number.

124545581 is a deficient number, since it is larger than the sum of its proper divisors (1).

124545581 is an equidigital number, since it uses as much as digits as its factorization.

124545581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32000, while the sum is 35.

The square root of 124545581 is about 11159.9991487455. Note that the first 3 decimals coincide. The cubic root of 124545581 is about 499.3933723033.

The spelling of 124545581 in words is "one hundred twenty-four million, five hundred forty-five thousand, five hundred eighty-one".