17121145 has 8 divisors (see below), whose sum is σ = 21208320. Its totient is φ = 13254960.

The previous prime is 17121127. The next prime is 17121163. The reversal of 17121145 is 54112171.

It is an interprime number because it is at equal distance from previous prime (17121127) and next prime (17121163).

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

It is not a de Polignac number, because 17121145 - 2⁷ = 17121017 is a prime.

It is a super-2 number, since 2×17121145² = 586267212222050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55075 + ... + 55384.

It is an arithmetic number, because the mean of its divisors is an integer number (2651040).

Almost surely, 2^17121145 is an apocalyptic number.

It is an amenable number.

17121145 is a deficient number, since it is larger than the sum of its proper divisors (4087175).

17121145 is a wasteful number, since it uses less digits than its factorization.

17121145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110495.

The product of its digits is 280, while the sum is 22.

The square root of 17121145 is about 4137.7705349620. The cubic root of 17121145 is about 257.7374941524.

It can be divided in two parts, 171 and 21145, that added together give a square (21316 = 146²).

The spelling of 17121145 in words is "seventeen million, one hundred twenty-one thousand, one hundred forty-five".