491275061 has 8 divisors (see below), whose sum is σ = 520390080. Its totient is φ = 462184128.

The previous prime is 491275019. The next prime is 491275069. The reversal of 491275061 is 160572194.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491275061 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 (491275069) by changing a digit.

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, 52070 + ... + 60776.

It is an arithmetic number, because the mean of its divisors is an integer number (65048760).

Almost surely, 2^491275061 is an apocalyptic number.

It is an amenable number.

491275061 is a deficient number, since it is larger than the sum of its proper divisors (29115019).

491275061 is a wasteful number, since it uses less digits than its factorization.

491275061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12043.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 491275061 is about 22164.7256017303. The cubic root of 491275061 is about 789.0567500945.

The spelling of 491275061 in words is "four hundred ninety-one million, two hundred seventy-five thousand, sixty-one".