17142391 has 8 divisors (see below), whose sum is σ = 19923840. Its totient is φ = 14444088.

The previous prime is 17142361. The next prime is 17142401. The reversal of 17142391 is 19324171.

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

It is a cyclic number.

It is not a de Polignac number, because 17142391 - 2⁹ = 17141879 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 (17142331) 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, 20341 + ... + 21166.

It is an arithmetic number, because the mean of its divisors is an integer number (2490480).

Almost surely, 2^17142391 is an apocalyptic number.

17142391 is a deficient number, since it is larger than the sum of its proper divisors (2781449).

17142391 is an equidigital number, since it uses as much as digits as its factorization.

17142391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41573.

The product of its digits is 1512, while the sum is 28.

The square root of 17142391 is about 4140.3370635734. The cubic root of 17142391 is about 257.8440607656.

The spelling of 17142391 in words is "seventeen million, one hundred forty-two thousand, three hundred ninety-one".