17142381 has 8 divisors (see below), whose sum is σ = 25396160. Its totient is φ = 11428236.

The previous prime is 17142361. The next prime is 17142401. The reversal of 17142381 is 18324171.

It is an interprime number because it is at equal distance from previous prime (17142361) and next prime (17142401).

It is not a de Polignac number, because 17142381 - 2¹⁹ = 16618093 is a prime.

It is a super-2 number, since 2×17142381² = 587722452698322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 634903 = 17142381 / (1 + 7 + 1 + 4 + 2 + 3 + 8 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17142331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317425 + ... + 317478.

It is an arithmetic number, because the mean of its divisors is an integer number (3174520).

Almost surely, 2^17142381 is an apocalyptic number.

It is an amenable number.

17142381 is a deficient number, since it is larger than the sum of its proper divisors (8253779).

17142381 is an equidigital number, since it uses as much as digits as its factorization.

17142381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634912 (or 634906 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 17142381 is about 4140.3358559421. The cubic root of 17142381 is about 257.8440106279.

It can be divided in two parts, 1714 and 2381, that added together give a triangular number (4095 = T₉₀).

The spelling of 17142381 in words is "seventeen million, one hundred forty-two thousand, three hundred eighty-one".