2124145145 has 4 divisors (see below), whose sum is σ = 2548974180. Its totient is φ = 1699316112.

The previous prime is 2124145129. The next prime is 2124145157. The reversal of 2124145145 is 5415414212.

It is a happy number.

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 1597121296 + 527023849 = 39964^2 + 22957^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124145145 - 2⁴ = 2124145129 is a prime.

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, 212414510 + ... + 212414519.

It is an arithmetic number, because the mean of its divisors is an integer number (637243545).

Almost surely, 2^2124145145 is an apocalyptic number.

It is an amenable number.

2124145145 is a deficient number, since it is larger than the sum of its proper divisors (424829035).

2124145145 is an equidigital number, since it uses as much as digits as its factorization.

2124145145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424829034.

The product of its digits is 6400, while the sum is 29.

The square root of 2124145145 is about 46088.4491494344. The cubic root of 2124145145 is about 1285.4683743299.

Adding to 2124145145 its reverse (5415414212), we get a palindrome (7539559357).

The spelling of 2124145145 in words is "two billion, one hundred twenty-four million, one hundred forty-five thousand, one hundred forty-five".