5172409 has 4 divisors (see below), whose sum is σ = 5642640. Its totient is φ = 4702180.

The previous prime is 5172407. The next prime is 5172449. The reversal of 5172409 is 9042715.

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 5172409 - 2¹ = 5172407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5172407) 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, 235099 + ... + 235120.

It is an arithmetic number, because the mean of its divisors is an integer number (1410660).

Almost surely, 2^5172409 is an apocalyptic number.

It is an amenable number.

5172409 is a deficient number, since it is larger than the sum of its proper divisors (470231).

5172409 is a wasteful number, since it uses less digits than its factorization.

5172409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470230.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 5172409 is about 2274.2930769802. The cubic root of 5172409 is about 172.9408620971.

It can be divided in two parts, 517 and 2409, that added together give a triangular number (2926 = T₇₆).

The spelling of 5172409 in words is "five million, one hundred seventy-two thousand, four hundred nine".