5172578 has 4 divisors (see below), whose sum is σ = 7758870. Its totient is φ = 2586288.

The previous prime is 5172571. The next prime is 5172647. The reversal of 5172578 is 8752715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2666689 + 2505889 = 1633^2 + 1583^2 .

It is a super-3 number, since 3×5172578³ (a number of 21 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5172571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1293143 + ... + 1293146.

Almost surely, 2^5172578 is an apocalyptic number.

5172578 is a deficient number, since it is larger than the sum of its proper divisors (2586292).

5172578 is a wasteful number, since it uses less digits than its factorization.

5172578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586291.

The product of its digits is 19600, while the sum is 35.

The square root of 5172578 is about 2274.3302310790. The cubic root of 5172578 is about 172.9427455965.

The spelling of 5172578 in words is "five million, one hundred seventy-two thousand, five hundred seventy-eight".