124120505 has 4 divisors (see below), whose sum is σ = 148944612. Its totient is φ = 99296400.

The previous prime is 124120487. The next prime is 124120537. The reversal of 124120505 is 505021421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505021421 = 3067 ⋅164663.

It can be written as a sum of positive squares in 2 ways, for example, as 91948921 + 32171584 = 9589^2 + 5672^2 .

It is not a de Polignac number, because 124120505 - 2¹² = 124116409 is a prime.

It is a super-2 number, since 2×124120505² = 30811799522910050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

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, 12412046 + ... + 12412055.

It is an arithmetic number, because the mean of its divisors is an integer number (37236153).

Almost surely, 2^124120505 is an apocalyptic number.

It is an amenable number.

124120505 is a deficient number, since it is larger than the sum of its proper divisors (24824107).

124120505 is an equidigital number, since it uses as much as digits as its factorization.

124120505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24824106.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 124120505 is about 11140.9382459468. The cubic root of 124120505 is about 498.8245789359.

Adding to 124120505 its reverse (505021421), we get a palindrome (629141926).

The spelling of 124120505 in words is "one hundred twenty-four million, one hundred twenty thousand, five hundred five".