61187061 has 16 divisors (see below), whose sum is σ = 91679616. Its totient is φ = 36015936.

The previous prime is 61187059. The next prime is 61187081. The reversal of 61187061 is 16078116.

It is a happy number.

It is not a de Polignac number, because 61187061 - 2¹ = 61187059 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61187051) 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, 33210 + ... + 35003.

It is an arithmetic number, because the mean of its divisors is an integer number (5729976).

Almost surely, 2^61187061 is an apocalyptic number.

It is an amenable number.

61187061 is a deficient number, since it is larger than the sum of its proper divisors (30492555).

61187061 is a wasteful number, since it uses less digits than its factorization.

61187061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68252.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 61187061 is about 7822.2158625290. The cubic root of 61187061 is about 394.0516929951.

The spelling of 61187061 in words is "sixty-one million, one hundred eighty-seven thousand, sixty-one".