17421253 has 4 divisors (see below), whose sum is σ = 17433088. Its totient is φ = 17409420.

The previous prime is 17421251. The next prime is 17421263. The reversal of 17421253 is 35212471.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 17421253 - 2¹ = 17421251 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 (17421251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3333 + ... + 6778.

It is an arithmetic number, because the mean of its divisors is an integer number (4358272).

Almost surely, 2^17421253 is an apocalyptic number.

It is an amenable number.

17421253 is a deficient number, since it is larger than the sum of its proper divisors (11835).

17421253 is a wasteful number, since it uses less digits than its factorization.

17421253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11834.

The product of its digits is 1680, while the sum is 25.

The square root of 17421253 is about 4173.8774538791. The cubic root of 17421253 is about 259.2346972949.

The spelling of 17421253 in words is "seventeen million, four hundred twenty-one thousand, two hundred fifty-three".