61148971 has 4 divisors (see below), whose sum is σ = 65852752. Its totient is φ = 56445192.

The previous prime is 61148959. The next prime is 61148981. The reversal of 61148971 is 17984116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61148971 - 2⁵ = 61148939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61148971.

It is not an unprimeable number, because it can be changed into a prime (61148911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2351871 + ... + 2351896.

It is an arithmetic number, because the mean of its divisors is an integer number (16463188).

Almost surely, 2^61148971 is an apocalyptic number.

61148971 is a deficient number, since it is larger than the sum of its proper divisors (4703781).

61148971 is a wasteful number, since it uses less digits than its factorization.

61148971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4703780.

The product of its digits is 12096, while the sum is 37.

The square root of 61148971 is about 7819.7807514022. The cubic root of 61148971 is about 393.9699080318.

The spelling of 61148971 in words is "sixty-one million, one hundred forty-eight thousand, nine hundred seventy-one".