61442161 has 16 divisors (see below), whose sum is σ = 68402880. Its totient is φ = 54723520.

The previous prime is 61442159. The next prime is 61442167. The reversal of 61442161 is 16124416.

It is a cyclic number.

It is not a de Polignac number, because 61442161 - 2¹ = 61442159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61442167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157755 + ... + 158143.

It is an arithmetic number, because the mean of its divisors is an integer number (4275180).

Almost surely, 2^61442161 is an apocalyptic number.

It is an amenable number.

61442161 is a deficient number, since it is larger than the sum of its proper divisors (6960719).

61442161 is a wasteful number, since it uses less digits than its factorization.

61442161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656.

The product of its digits is 1152, while the sum is 25.

The square root of 61442161 is about 7838.5050232809. The cubic root of 61442161 is about 394.5985581271.

Adding to 61442161 its reverse (16124416), we get a palindrome (77566577).

The spelling of 61442161 in words is "sixty-one million, four hundred forty-two thousand, one hundred sixty-one".