17420842 has 4 divisors (see below), whose sum is σ = 26131266. Its totient is φ = 8710420.

The previous prime is 17420833. The next prime is 17420849. The reversal of 17420842 is 24802471.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9235521 + 8185321 = 3039^2 + 2861^2 .

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 17420842.

It is not an unprimeable number, because it can be changed into a prime (17420849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4355209 + ... + 4355212.

Almost surely, 2^17420842 is an apocalyptic number.

17420842 is a deficient number, since it is larger than the sum of its proper divisors (8710424).

17420842 is an equidigital number, since it uses as much as digits as its factorization.

17420842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8710423.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 17420842 is about 4173.8282187939. The cubic root of 17420842 is about 259.2326586681.

The spelling of 17420842 in words is "seventeen million, four hundred twenty thousand, eight hundred forty-two".