61147972 has 12 divisors (see below), whose sum is σ = 107168656. Its totient is φ = 30528360.

The previous prime is 61147967. The next prime is 61147981. The reversal of 61147972 is 27974116.

It is an unprimeable number.

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, 8298 + ... + 13825.

Almost surely, 2^61147972 is an apocalyptic number.

It is an amenable number.

61147972 is a deficient number, since it is larger than the sum of its proper divisors (46020684).

61147972 is a wasteful number, since it uses less digits than its factorization.

61147972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22818 (or 22816 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 61147972 is about 7819.7168746701. The cubic root of 61147972 is about 393.9677625715.

The spelling of 61147972 in words is "sixty-one million, one hundred forty-seven thousand, nine hundred seventy-two".