17142987 has 16 divisors (see below), whose sum is σ = 24367392. Its totient is φ = 10682880.

The previous prime is 17142977. The next prime is 17142991. The reversal of 17142987 is 78924171.

It is not a de Polignac number, because 17142987 - 2⁷ = 17142859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17142977) 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 15 ways as a sum of consecutive naturals, for example, 6937 + ... + 9077.

It is an arithmetic number, because the mean of its divisors is an integer number (1522962).

Almost surely, 2^17142987 is an apocalyptic number.

17142987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

17142987 is a deficient number, since it is larger than the sum of its proper divisors (7224405).

17142987 is a wasteful number, since it uses less digits than its factorization.

17142987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318.

The product of its digits is 28224, while the sum is 39.

The square root of 17142987 is about 4140.4090377643. The cubic root of 17142987 is about 257.8470489384.

The spelling of 17142987 in words is "seventeen million, one hundred forty-two thousand, nine hundred eighty-seven".