5128609 has 8 divisors (see below), whose sum is σ = 5524992. Its totient is φ = 4746720.

The previous prime is 5128603. The next prime is 5128633. The reversal of 5128609 is 9068215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5128609 - 2¹⁵ = 5095841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5128603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2884 + ... + 4309.

It is an arithmetic number, because the mean of its divisors is an integer number (690624).

Almost surely, 2^5128609 is an apocalyptic number.

It is an amenable number.

5128609 is a deficient number, since it is larger than the sum of its proper divisors (396383).

5128609 is a wasteful number, since it uses less digits than its factorization.

5128609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7247.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 5128609 is about 2264.6432390114. The cubic root of 5128609 is about 172.4513228192.

The spelling of 5128609 in words is "five million, one hundred twenty-eight thousand, six hundred nine".