170315421 has 8 divisors (see below), whose sum is σ = 227525184. Its totient is φ = 113324640.

The previous prime is 170315363. The next prime is 170315429. The reversal of 170315421 is 124513071.

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

It is not a de Polignac number, because 170315421 - 2⁷ = 170315293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 170315391 and 170315400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170315429) 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, 52921 + ... + 56046.

It is an arithmetic number, because the mean of its divisors is an integer number (28440648).

Almost surely, 2^170315421 is an apocalyptic number.

It is an amenable number.

170315421 is a deficient number, since it is larger than the sum of its proper divisors (57209763).

170315421 is a wasteful number, since it uses less digits than its factorization.

170315421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109491.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 170315421 is about 13050.4950480815. The cubic root of 170315421 is about 554.3082266533.

Adding to 170315421 its reverse (124513071), we get a palindrome (294828492).

The spelling of 170315421 in words is "one hundred seventy million, three hundred fifteen thousand, four hundred twenty-one".