261272162 has 4 divisors (see below), whose sum is σ = 391908246. Its totient is φ = 130636080.

The previous prime is 261272161. The next prime is 261272177.

It is a happy number.

261272162 is nontrivially palindromic in base 10.

261272162 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 156025081 + 105247081 = 12491^2 + 10259^2 .

It is not an unprimeable number, because it can be changed into a prime (261272161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65318039 + ... + 65318042.

Almost surely, 2^261272162 is an apocalyptic number.

261272162 is a deficient number, since it is larger than the sum of its proper divisors (130636084).

261272162 is a wasteful number, since it uses less digits than its factorization.

261272162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130636083.

The product of its digits is 4032, while the sum is 29.

The square root of 261272162 is about 16163.9154291279. The cubic root of 261272162 is about 639.2897084075.

The spelling of 261272162 in words is "two hundred sixty-one million, two hundred seventy-two thousand, one hundred sixty-two".