127120891 has 8 divisors (see below), whose sum is σ = 133091280. Its totient is φ = 121256352.

The previous prime is 127120867. The next prime is 127120913. The reversal of 127120891 is 198021721.

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 127120891 - 2²¹ = 125023739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127120831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24000 + ... + 28813.

It is an arithmetic number, because the mean of its divisors is an integer number (16636410).

Almost surely, 2^127120891 is an apocalyptic number.

127120891 is a deficient number, since it is larger than the sum of its proper divisors (5970389).

127120891 is an equidigital number, since it uses as much as digits as its factorization.

127120891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52925.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 127120891 is about 11274.7900645644. The cubic root of 127120891 is about 502.8120102162.

The spelling of 127120891 in words is "one hundred twenty-seven million, one hundred twenty thousand, eight hundred ninety-one".