2305072145 has 4 divisors (see below), whose sum is σ = 2766086580. Its totient is φ = 1844057712.

The previous prime is 2305072129. The next prime is 2305072151. The reversal of 2305072145 is 5412705032.

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 875627281 + 1429444864 = 29591^2 + 37808^2 .

It is a cyclic number.

It is not a de Polignac number, because 2305072145 - 2⁴ = 2305072129 is a prime.

It is an alternating number because its digits alternate between even and odd.

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, 230507210 + ... + 230507219.

It is an arithmetic number, because the mean of its divisors is an integer number (691521645).

Almost surely, 2^2305072145 is an apocalyptic number.

It is an amenable number.

2305072145 is a deficient number, since it is larger than the sum of its proper divisors (461014435).

2305072145 is an equidigital number, since it uses as much as digits as its factorization.

2305072145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461014434.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 2305072145 is about 48011.1668781337. The cubic root of 2305072145 is about 1320.9757372782.

Adding to 2305072145 its reverse (5412705032), we get a palindrome (7717777177).

The spelling of 2305072145 in words is "two billion, three hundred five million, seventy-two thousand, one hundred forty-five".