61235161 has 4 divisors (see below), whose sum is σ = 65945572. Its totient is φ = 56524752.

The previous prime is 61235147. The next prime is 61235197. The reversal of 61235161 is 16153216.

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 3763600 + 57471561 = 1940^2 + 7581^2 .

It is a cyclic number.

It is not a de Polignac number, because 61235161 - 2²³ = 52846553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61235561) 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 3 ways as a sum of consecutive naturals, for example, 2355186 + ... + 2355211.

It is an arithmetic number, because the mean of its divisors is an integer number (16486393).

Almost surely, 2^61235161 is an apocalyptic number.

It is an amenable number.

61235161 is a deficient number, since it is larger than the sum of its proper divisors (4710411).

61235161 is a wasteful number, since it uses less digits than its factorization.

61235161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4710410.

The product of its digits is 1080, while the sum is 25.

The square root of 61235161 is about 7825.2898348879. The cubic root of 61235161 is about 394.1549224560.

Adding to 61235161 its reverse (16153216), we get a palindrome (77388377).

The spelling of 61235161 in words is "sixty-one million, two hundred thirty-five thousand, one hundred sixty-one".