17420245 has 16 divisors (see below), whose sum is σ = 22127040. Its totient is φ = 13129344.

The previous prime is 17420243. The next prime is 17420267. The reversal of 17420245 is 54202471.

It is a cyclic number.

It is not a de Polignac number, because 17420245 - 2¹ = 17420243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17420243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21742 + ... + 22528.

It is an arithmetic number, because the mean of its divisors is an integer number (1382940).

Almost surely, 2^17420245 is an apocalyptic number.

It is an amenable number.

17420245 is a deficient number, since it is larger than the sum of its proper divisors (4706795).

17420245 is a wasteful number, since it uses less digits than its factorization.

17420245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 17420245 is about 4173.7567011027. The cubic root of 17420245 is about 259.2296973940.

The spelling of 17420245 in words is "seventeen million, four hundred twenty thousand, two hundred forty-five".