5156781 has 8 divisors (see below), whose sum is σ = 7857984. Its totient is φ = 2946720.

The previous prime is 5156779. The next prime is 5156783. The reversal of 5156781 is 1876515.

It is an interprime number because it is at equal distance from previous prime (5156779) and next prime (5156783).

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

It is not a de Polignac number, because 5156781 - 2¹ = 5156779 is a prime.

It is a super-2 number, since 2×5156781² = 53184780563922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5156783) 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, 122760 + ... + 122801.

It is an arithmetic number, because the mean of its divisors is an integer number (982248).

Almost surely, 2^5156781 is an apocalyptic number.

It is an amenable number.

5156781 is a deficient number, since it is larger than the sum of its proper divisors (2701203).

5156781 is a wasteful number, since it uses less digits than its factorization.

5156781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245571.

The product of its digits is 8400, while the sum is 33.

The square root of 5156781 is about 2270.8546849149. The cubic root of 5156781 is about 172.7665109463.

The spelling of 5156781 in words is "five million, one hundred fifty-six thousand, seven hundred eighty-one".