171070421 has 4 divisors (see below), whose sum is σ = 171383712. Its totient is φ = 170757132.

The previous prime is 171070381. The next prime is 171070447. The reversal of 171070421 is 124070171.

171070421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 171070421 - 2¹⁰ = 171069397 is a prime.

It is a super-2 number, since 2×171070421² = 58530177882234482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171070451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155825 + ... + 156918.

It is an arithmetic number, because the mean of its divisors is an integer number (42845928).

Almost surely, 2^171070421 is an apocalyptic number.

It is an amenable number.

171070421 is a deficient number, since it is larger than the sum of its proper divisors (313291).

171070421 is an equidigital number, since it uses as much as digits as its factorization.

171070421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313290.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 171070421 is about 13079.3891676943. The cubic root of 171070421 is about 555.1260931476.

The spelling of 171070421 in words is "one hundred seventy-one million, seventy thousand, four hundred twenty-one".