127393921 has 8 divisors (see below), whose sum is σ = 129729600. Its totient is φ = 125064240.

The previous prime is 127393919. The next prime is 127393933. The reversal of 127393921 is 129393721.

It is a happy number.

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 127393921 - 2¹ = 127393919 is a prime.

It is a super-2 number, since 2×127393921² = 32458422215508482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127393901) 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, 83556 + ... + 85066.

It is an arithmetic number, because the mean of its divisors is an integer number (16216200).

Almost surely, 2^127393921 is an apocalyptic number.

It is an amenable number.

127393921 is a deficient number, since it is larger than the sum of its proper divisors (2335679).

127393921 is a wasteful number, since it uses less digits than its factorization.

127393921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2999.

The product of its digits is 20412, while the sum is 37.

The square root of 127393921 is about 11286.8915561371. The cubic root of 127393921 is about 503.1717323514.

The spelling of 127393921 in words is "one hundred twenty-seven million, three hundred ninety-three thousand, nine hundred twenty-one".