61275191 has 8 divisors (see below), whose sum is σ = 65550240. Its totient is φ = 57074688.

The previous prime is 61275187. The next prime is 61275223. The reversal of 61275191 is 19157216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61275191 - 2² = 61275187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61275121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16931 + ... + 20228.

It is an arithmetic number, because the mean of its divisors is an integer number (8193780).

Almost surely, 2^61275191 is an apocalyptic number.

61275191 is a deficient number, since it is larger than the sum of its proper divisors (4275049).

61275191 is a wasteful number, since it uses less digits than its factorization.

61275191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37273.

The product of its digits is 3780, while the sum is 32.

The square root of 61275191 is about 7827.8471497596. The cubic root of 61275191 is about 394.2407913395.

The spelling of 61275191 in words is "sixty-one million, two hundred seventy-five thousand, one hundred ninety-one".