127382981 has 4 divisors (see below), whose sum is σ = 138963264. Its totient is φ = 115802700.

The previous prime is 127382977. The next prime is 127382987. The reversal of 127382981 is 189283721.

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 127382981 - 2² = 127382977 is a prime.

It is a super-2 number, since 2×127382981² = 32452847696892722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127382987) 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 3 ways as a sum of consecutive naturals, for example, 5790125 + ... + 5790146.

It is an arithmetic number, because the mean of its divisors is an integer number (34740816).

Almost surely, 2^127382981 is an apocalyptic number.

127382981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

127382981 is a deficient number, since it is larger than the sum of its proper divisors (11580283).

127382981 is a wasteful number, since it uses less digits than its factorization.

127382981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11580282.

The product of its digits is 48384, while the sum is 41.

The square root of 127382981 is about 11286.4069127424. The cubic root of 127382981 is about 503.1573285863.

The spelling of 127382981 in words is "one hundred twenty-seven million, three hundred eighty-two thousand, nine hundred eighty-one".