124454545 has 4 divisors (see below), whose sum is σ = 149345460. Its totient is φ = 99563632.

The previous prime is 124454531. The next prime is 124454549. The reversal of 124454545 is 545454421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67436944 + 57017601 = 8212^2 + 7551^2 .

It is a cyclic number.

It is not a de Polignac number, because 124454545 - 2¹⁵ = 124421777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 124454545.

It is not an unprimeable number, because it can be changed into a prime (124454549) 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 in 3 ways as a sum of consecutive naturals, for example, 12445450 + ... + 12445459.

It is an arithmetic number, because the mean of its divisors is an integer number (37336365).

Almost surely, 2^124454545 is an apocalyptic number.

It is an amenable number.

124454545 is a deficient number, since it is larger than the sum of its proper divisors (24890915).

124454545 is an equidigital number, since it uses as much as digits as its factorization.

124454545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24890914.

The product of its digits is 64000, while the sum is 34.

The square root of 124454545 is about 11155.9197290049. The cubic root of 124454545 is about 499.2716662417.

The spelling of 124454545 in words is "one hundred twenty-four million, four hundred fifty-four thousand, five hundred forty-five".