61252161 has 4 divisors (see below), whose sum is σ = 81669552. Its totient is φ = 40834772.

The previous prime is 61252127. The next prime is 61252171. The reversal of 61252161 is 16125216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61252161 - 2¹¹ = 61250113 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (61252171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10208691 + ... + 10208696.

It is an arithmetic number, because the mean of its divisors is an integer number (20417388).

Almost surely, 2^61252161 is an apocalyptic number.

It is an amenable number.

61252161 is a deficient number, since it is larger than the sum of its proper divisors (20417391).

61252161 is a wasteful number, since it uses less digits than its factorization.

61252161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20417390.

The product of its digits is 720, while the sum is 24.

The square root of 61252161 is about 7826.3759812572. The cubic root of 61252161 is about 394.1913939515.

Adding to 61252161 its reverse (16125216), we get a palindrome (77377377).

The spelling of 61252161 in words is "sixty-one million, two hundred fifty-two thousand, one hundred sixty-one".