127398381 has 8 divisors (see below), whose sum is σ = 185306784. Its totient is φ = 77211120.

The previous prime is 127398377. The next prime is 127398409. The reversal of 127398381 is 183893721.

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

It is not a de Polignac number, because 127398381 - 2² = 127398377 is a prime.

It is a super-2 number, since 2×127398381² = 32460694962842322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127398361) 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, 1930246 + ... + 1930311.

It is an arithmetic number, because the mean of its divisors is an integer number (23163348).

Almost surely, 2^127398381 is an apocalyptic number.

127398381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

127398381 is a deficient number, since it is larger than the sum of its proper divisors (57908403).

127398381 is a wasteful number, since it uses less digits than its factorization.

127398381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3860571.

The product of its digits is 72576, while the sum is 42.

The square root of 127398381 is about 11287.0891287347. The cubic root of 127398381 is about 503.1776042165.

The spelling of 127398381 in words is "one hundred twenty-seven million, three hundred ninety-eight thousand, three hundred eighty-one".