17242621 has 6 divisors (see below), whose sum is σ = 18952766. Its totient is φ = 15675000.

The previous prime is 17242609. The next prime is 17242627. The reversal of 17242621 is 12624271.

It can be written as a sum of positive squares in only one way, i.e., 13579225 + 3663396 = 3685^2 + 1914^2 .

It is not a de Polignac number, because 17242621 - 2⁹ = 17242109 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 (17242627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71130 + ... + 71371.

Almost surely, 2^17242621 is an apocalyptic number.

17242621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

17242621 is a deficient number, since it is larger than the sum of its proper divisors (1710145).

17242621 is a wasteful number, since it uses less digits than its factorization.

17242621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142523 (or 142512 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 17242621 is about 4152.4235092293. The cubic root of 17242621 is about 258.3456147705.

Adding to 17242621 its reverse (12624271), we get a palindrome (29866892).

The spelling of 17242621 in words is "seventeen million, two hundred forty-two thousand, six hundred twenty-one".