5251978 has 8 divisors (see below), whose sum is σ = 8007300. Its totient is φ = 2582880.

The previous prime is 5251951. The next prime is 5252011. The reversal of 5251978 is 8791525.

It can be written as a sum of positive squares in 2 ways, for example, as 5230369 + 21609 = 2287^2 + 147^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21403 + ... + 21646.

Almost surely, 2^5251978 is an apocalyptic number.

5251978 is a deficient number, since it is larger than the sum of its proper divisors (2755322).

5251978 is a wasteful number, since it uses less digits than its factorization.

5251978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43112.

The product of its digits is 25200, while the sum is 37.

The square root of 5251978 is about 2291.7194418166. The cubic root of 5251978 is about 173.8231567440.

The spelling of 5251978 in words is "five million, two hundred fifty-one thousand, nine hundred seventy-eight".