61142660 has 24 divisors (see below), whose sum is σ = 128546880. Its totient is φ = 24429024.

The previous prime is 61142647. The next prime is 61142681. The reversal of 61142660 is 6624116.

It is a happy number.

61142660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31601 + ... + 33479.

It is an arithmetic number, because the mean of its divisors is an integer number (5356120).

Almost surely, 2^61142660 is an apocalyptic number.

It is an amenable number.

61142660 is an abundant number, since it is smaller than the sum of its proper divisors (67404220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61142660 is a wasteful number, since it uses less digits than its factorization.

61142660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515 (or 3513 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 61142660 is about 7819.3772130522. The cubic root of 61142660 is about 393.9563540854.

Adding to 61142660 its reverse (6624116), we get a palindrome (67766776).

The spelling of 61142660 in words is "sixty-one million, one hundred forty-two thousand, six hundred sixty".