127139621 has 8 divisors (see below), whose sum is σ = 152950080. Its totient is φ = 103241088.

The previous prime is 127139591. The next prime is 127139627. The reversal of 127139621 is 126931721.

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 127139621 - 2⁶ = 127139557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127139627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477836 + ... + 478101.

It is an arithmetic number, because the mean of its divisors is an integer number (19118760).

Almost surely, 2^127139621 is an apocalyptic number.

It is an amenable number.

127139621 is a deficient number, since it is larger than the sum of its proper divisors (25810459).

127139621 is an equidigital number, since it uses as much as digits as its factorization.

127139621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955963.

The product of its digits is 4536, while the sum is 32.

The square root of 127139621 is about 11275.6206481062. The cubic root of 127139621 is about 502.8367037877.

The spelling of 127139621 in words is "one hundred twenty-seven million, one hundred thirty-nine thousand, six hundred twenty-one".