65251129 has 4 divisors (see below), whose sum is σ = 65338084. Its totient is φ = 65164176.

The previous prime is 65251103. The next prime is 65251133. The reversal of 65251129 is 92115256.

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 14100025 + 51151104 = 3755^2 + 7152^2 .

It is a cyclic number.

It is not a de Polignac number, because 65251129 - 2⁵ = 65251097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65251129.

It is not an unprimeable number, because it can be changed into a prime (65251159) 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, 42342 + ... + 43855.

It is an arithmetic number, because the mean of its divisors is an integer number (16334521).

Almost surely, 2^65251129 is an apocalyptic number.

It is an amenable number.

65251129 is a deficient number, since it is larger than the sum of its proper divisors (86955).

65251129 is an equidigital number, since it uses as much as digits as its factorization.

65251129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86954.

The product of its digits is 5400, while the sum is 31.

The square root of 65251129 is about 8077.8170937451. The cubic root of 65251129 is about 402.5897159938.

The spelling of 65251129 in words is "sixty-five million, two hundred fifty-one thousand, one hundred twenty-nine".