124024781 has 2 divisors, whose sum is σ = 124024782. Its totient is φ = 124024780.

The previous prime is 124024739. The next prime is 124024783. The reversal of 124024781 is 187420421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115562500 + 8462281 = 10750^2 + 2909^2 .

It is a cyclic number.

It is not a de Polignac number, because 124024781 - 2²⁶ = 56915917 is a prime.

It is a super-2 number, since 2×124024781² = 30764292604195922, which contains 22 as substring.

Together with 124024783, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_7057820 and since 124024781 and 7057820 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124024783) 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, 62012390 + 62012391.

It is an arithmetic number, because the mean of its divisors is an integer number (62012391).

Almost surely, 2^124024781 is an apocalyptic number.

It is an amenable number.

124024781 is a deficient number, since it is larger than the sum of its proper divisors (1).

124024781 is an equidigital number, since it uses as much as digits as its factorization.

124024781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 124024781 is about 11136.6413698206. The cubic root of 124024781 is about 498.6963117482.

The spelling of 124024781 in words is "one hundred twenty-four million, twenty-four thousand, seven hundred eighty-one".