1881113 has 4 divisors (see below), whose sum is σ = 2025828. Its totient is φ = 1736400.

The previous prime is 1881109. The next prime is 1881119. The reversal of 1881113 is 3111881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 565504 + 1315609 = 752^2 + 1147^2 .

It is a cyclic number.

It is not a de Polignac number, because 1881113 - 2² = 1881109 is a prime.

It is a super-2 number, since 2×1881113² = 7077172237538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1881119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72338 + ... + 72363.

It is an arithmetic number, because the mean of its divisors is an integer number (506457).

2^1881113 is an apocalyptic number.

1881113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1881113 is a deficient number, since it is larger than the sum of its proper divisors (144715).

1881113 is a wasteful number, since it uses less digits than its factorization.

1881113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144714.

The product of its digits is 192, while the sum is 23.

The square root of 1881113 is about 1371.5367293660. The cubic root of 1881113 is about 123.4444668289. Note that the first 4 decimals are identical.

Adding to 1881113 its reverse (3111881), we get a palindrome (4992994).

The spelling of 1881113 in words is "one million, eight hundred eighty-one thousand, one hundred thirteen".