2145122245 has 12 divisors (see below), whose sum is σ = 2994415884. Its totient is φ = 1470940800.

The previous prime is 2145122227. The next prime is 2145122251. The reversal of 2145122245 is 5422215412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1479017764 + 666104481 = 38458^2 + 25809^2 .

It is not a de Polignac number, because 2145122245 - 2⁹ = 2145121733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4377556 + ... + 4378045.

It is an arithmetic number, because the mean of its divisors is an integer number (249534657).

Almost surely, 2^2145122245 is an apocalyptic number.

It is an amenable number.

2145122245 is a deficient number, since it is larger than the sum of its proper divisors (849293639).

2145122245 is an equidigital number, since it uses as much as digits as its factorization.

2145122245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8755620 (or 8755613 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 2145122245 is about 46315.4644260424. The cubic root of 2145122245 is about 1289.6860893138.

Adding to 2145122245 its reverse (5422215412), we get a palindrome (7567337657).

The spelling of 2145122245 in words is "two billion, one hundred forty-five million, one hundred twenty-two thousand, two hundred forty-five".