4681381 has 4 divisors (see below), whose sum is σ = 4715200. Its totient is φ = 4647564.

The previous prime is 4681379. The next prime is 4681399. The reversal of 4681381 is 1831864.

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.

It is a cyclic number.

It is not a de Polignac number, because 4681381 - 2¹ = 4681379 is a prime.

It is a super-2 number, since 2×4681381² = 43830656134322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4681301) 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 in 3 ways as a sum of consecutive naturals, for example, 16701 + ... + 16978.

It is an arithmetic number, because the mean of its divisors is an integer number (1178800).

Almost surely, 2^4681381 is an apocalyptic number.

It is an amenable number.

4681381 is a deficient number, since it is larger than the sum of its proper divisors (33819).

4681381 is a wasteful number, since it uses less digits than its factorization.

4681381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33818.

The product of its digits is 4608, while the sum is 31.

The square root of 4681381 is about 2163.6499254732. The cubic root of 4681381 is about 167.2853834065.

It can be divided in two parts, 468 and 1381, that added together give a square (1849 = 43²).

The spelling of 4681381 in words is "four million, six hundred eighty-one thousand, three hundred eighty-one".