2145404145 has 8 divisors (see below), whose sum is σ = 3432646656. Its totient is φ = 1144215536.

The previous prime is 2145404123. The next prime is 2145404147. The reversal of 2145404145 is 5414045412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2145404145 - 2⁵ = 2145404113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2145404147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71513457 + ... + 71513486.

It is an arithmetic number, because the mean of its divisors is an integer number (429080832).

Almost surely, 2^2145404145 is an apocalyptic number.

It is an amenable number.

2145404145 is a deficient number, since it is larger than the sum of its proper divisors (1287242511).

2145404145 is a wasteful number, since it uses less digits than its factorization.

2145404145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143026951.

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 2145404145 is about 46318.5075860611. The cubic root of 2145404145 is about 1289.7425812900.

Adding to 2145404145 its reverse (5414045412), we get a palindrome (7559449557).

The spelling of 2145404145 in words is "two billion, one hundred forty-five million, four hundred four thousand, one hundred forty-five".