124521013 has 2 divisors, whose sum is σ = 124521014. Its totient is φ = 124521012.

The previous prime is 124520993. The next prime is 124521029. The reversal of 124521013 is 310125421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120165444 + 4355569 = 10962^2 + 2087^2 .

It is an emirp because it is prime and its reverse (310125421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124521013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124521043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62260506 + 62260507.

It is an arithmetic number, because the mean of its divisors is an integer number (62260507).

Almost surely, 2^124521013 is an apocalyptic number.

It is an amenable number.

124521013 is a deficient number, since it is larger than the sum of its proper divisors (1).

124521013 is an equidigital number, since it uses as much as digits as its factorization.

124521013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 124521013 is about 11158.8983775281. The cubic root of 124521013 is about 499.3605331797.

Adding to 124521013 its reverse (310125421), we get a palindrome (434646434).

The spelling of 124521013 in words is "one hundred twenty-four million, five hundred twenty-one thousand, thirteen".