171421007 has 4 divisors (see below), whose sum is σ = 171650016. Its totient is φ = 171192000.

The previous prime is 171420973. The next prime is 171421039. The reversal of 171421007 is 700124171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 700124171 = 283 ⋅2473937.

It is a cyclic number.

It is not a de Polignac number, because 171421007 - 2⁸ = 171420751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171421067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113378 + ... + 114879.

It is an arithmetic number, because the mean of its divisors is an integer number (42912504).

Almost surely, 2^171421007 is an apocalyptic number.

171421007 is a deficient number, since it is larger than the sum of its proper divisors (229009).

171421007 is an equidigital number, since it uses as much as digits as its factorization.

171421007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229008.

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

The square root of 171421007 is about 13092.7845395852. The cubic root of 171421007 is about 555.5050533397.

Adding to 171421007 its reverse (700124171), we get a palindrome (871545178).

The spelling of 171421007 in words is "one hundred seventy-one million, four hundred twenty-one thousand, seven".