127120381 has 4 divisors (see below), whose sum is σ = 127452672. Its totient is φ = 126788092.

The previous prime is 127120361. The next prime is 127120403. The reversal of 127120381 is 183021721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 127120381 - 2⁵ = 127120349 is a prime.

It is a super-2 number, since 2×127120381² = 32319182531170322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127120321) 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 3 ways as a sum of consecutive naturals, for example, 165571 + ... + 166336.

It is an arithmetic number, because the mean of its divisors is an integer number (31863168).

Almost surely, 2^127120381 is an apocalyptic number.

It is an amenable number.

127120381 is a deficient number, since it is larger than the sum of its proper divisors (332291).

127120381 is an equidigital number, since it uses as much as digits as its factorization.

127120381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332290.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 127120381 is about 11274.7674477126. The cubic root of 127120381 is about 502.8113377999.

The spelling of 127120381 in words is "one hundred twenty-seven million, one hundred twenty thousand, three hundred eighty-one".