170440121 has 4 divisors (see below), whose sum is σ = 170467044. Its totient is φ = 170413200.

The previous prime is 170440111. The next prime is 170440133. The reversal of 170440121 is 121044071.

170440121 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 brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 121044071 = 107 ⋅1131253.

It can be written as a sum of positive squares in 2 ways, for example, as 141967225 + 28472896 = 11915^2 + 5336^2 .

It is a cyclic number.

It is not a de Polignac number, because 170440121 - 2¹⁸ = 170177977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 170440093 and 170440102.

It is not an unprimeable number, because it can be changed into a prime (170440111) 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, 1811 + ... + 18551.

It is an arithmetic number, because the mean of its divisors is an integer number (42616761).

Almost surely, 2^170440121 is an apocalyptic number.

It is an amenable number.

170440121 is a deficient number, since it is larger than the sum of its proper divisors (26923).

170440121 is a wasteful number, since it uses less digits than its factorization.

170440121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26922.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 170440121 is about 13055.2717704382. The cubic root of 170440121 is about 554.4434764398.

Adding to 170440121 its reverse (121044071), we get a palindrome (291484192).

The spelling of 170440121 in words is "one hundred seventy million, four hundred forty thousand, one hundred twenty-one".