245771129 has 4 divisors (see below), whose sum is σ = 248026020. Its totient is φ = 243516240.

The previous prime is 245771107. The next prime is 245771153. The reversal of 245771129 is 921177542.

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 187279225 + 58491904 = 13685^2 + 7648^2 .

It is a cyclic number.

It is not a de Polignac number, because 245771129 - 2⁸ = 245770873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245771092 and 245771101.

It is not an unprimeable number, because it can be changed into a prime (245774129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127282 + ... + 1127499.

It is an arithmetic number, because the mean of its divisors is an integer number (62006505).

Almost surely, 2^245771129 is an apocalyptic number.

It is an amenable number.

245771129 is a deficient number, since it is larger than the sum of its proper divisors (2254891).

245771129 is a wasteful number, since it uses less digits than its factorization.

245771129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2254890.

The product of its digits is 35280, while the sum is 38.

The square root of 245771129 is about 15677.0893025459. The cubic root of 245771129 is about 626.3882774274.

The spelling of 245771129 in words is "two hundred forty-five million, seven hundred seventy-one thousand, one hundred twenty-nine".