5135681 has 4 divisors (see below), whose sum is σ = 5406000. Its totient is φ = 4865364.

The previous prime is 5135671. The next prime is 5135687. The reversal of 5135681 is 1865315.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1865315 = 5 ⋅373063.

It is a cyclic number.

It is not a de Polignac number, because 5135681 - 2¹⁴ = 5119297 is a prime.

It is a super-2 number, since 2×5135681² = 52750438667522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5135687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135131 + ... + 135168.

It is an arithmetic number, because the mean of its divisors is an integer number (1351500).

Almost surely, 2^5135681 is an apocalyptic number.

It is an amenable number.

5135681 is a deficient number, since it is larger than the sum of its proper divisors (270319).

5135681 is a wasteful number, since it uses less digits than its factorization.

5135681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270318.

The product of its digits is 3600, while the sum is 29.

The square root of 5135681 is about 2266.2040949570. The cubic root of 5135681 is about 172.5305525943.

The spelling of 5135681 in words is "five million, one hundred thirty-five thousand, six hundred eighty-one".