4911381 has 8 divisors (see below), whose sum is σ = 7276160. Its totient is φ = 3274236.

The previous prime is 4911373. The next prime is 4911383. The reversal of 4911381 is 1831194.

It is not a de Polignac number, because 4911381 - 2³ = 4911373 is a prime.

It is a super-2 number, since 2×4911381² = 48243326654322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 181903 = 4911381 / (4 + 9 + 1 + 1 + 3 + 8 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4911383) 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 7 ways as a sum of consecutive naturals, for example, 90925 + ... + 90978.

It is an arithmetic number, because the mean of its divisors is an integer number (909520).

Almost surely, 2^4911381 is an apocalyptic number.

It is an amenable number.

4911381 is a deficient number, since it is larger than the sum of its proper divisors (2364779).

4911381 is a wasteful number, since it uses less digits than its factorization.

4911381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181912 (or 181906 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 4911381 is about 2216.1635769952. The cubic root of 4911381 is about 169.9813243613.

It can be divided in two parts, 49113 and 81, that added together give a palindrome (49194).

The spelling of 4911381 in words is "four million, nine hundred eleven thousand, three hundred eighty-one".