124431145 has 4 divisors (see below), whose sum is σ = 149317380. Its totient is φ = 99544912.

The previous prime is 124431119. The next prime is 124431161. The reversal of 124431145 is 541134421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541134421 = 19 ⋅28480759.

It can be written as a sum of positive squares in 2 ways, for example, as 32501401 + 91929744 = 5701^2 + 9588^2 .

It is a cyclic number.

It is not a de Polignac number, because 124431145 - 2⁵ = 124431113 is a prime.

It is a super-2 number, since 2×124431145² = 30966219692022050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12443110 + ... + 12443119.

It is an arithmetic number, because the mean of its divisors is an integer number (37329345).

Almost surely, 2^124431145 is an apocalyptic number.

It is an amenable number.

124431145 is a deficient number, since it is larger than the sum of its proper divisors (24886235).

124431145 is an equidigital number, since it uses as much as digits as its factorization.

124431145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24886234.

The product of its digits is 1920, while the sum is 25.

The square root of 124431145 is about 11154.8709091589. The cubic root of 124431145 is about 499.2403731853.

Adding to 124431145 its reverse (541134421), we get a palindrome (665565566).

The spelling of 124431145 in words is "one hundred twenty-four million, four hundred thirty-one thousand, one hundred forty-five".