8170127421 has 8 divisors (see below), whose sum is σ = 10893926784. Its totient is φ = 5446539840.

The previous prime is 8170127401. The next prime is 8170127431. The reversal of 8170127421 is 1247210718.

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

It is not a de Polignac number, because 8170127421 - 2⁵ = 8170127389 is a prime.

It is a super-2 number, since 2×8170127421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8170127401) 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, 101116 + ... + 162986.

It is an arithmetic number, because the mean of its divisors is an integer number (1361740848).

Almost surely, 2^8170127421 is an apocalyptic number.

It is an amenable number.

8170127421 is a deficient number, since it is larger than the sum of its proper divisors (2723799363).

8170127421 is a wasteful number, since it uses less digits than its factorization.

8170127421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105891.

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 8170127421 is about 90388.7571603903. The cubic root of 8170127421 is about 2014.0779581230.

The spelling of 8170127421 in words is "eight billion, one hundred seventy million, one hundred twenty-seven thousand, four hundred twenty-one".