1181841 has 4 divisors (see below), whose sum is σ = 1575792. Its totient is φ = 787892.

The previous prime is 1181839. The next prime is 1181879. The reversal of 1181841 is 1481811.

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: 1481811 = 3 ⋅493937.

It is a cyclic number.

It is not a de Polignac number, because 1181841 - 2¹ = 1181839 is a prime.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1181881) 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, 196971 + ... + 196976.

It is an arithmetic number, because the mean of its divisors is an integer number (393948).

2^1181841 is an apocalyptic number.

It is an amenable number.

1181841 is a deficient number, since it is larger than the sum of its proper divisors (393951).

1181841 is an equidigital number, since it uses as much as digits as its factorization.

1181841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393950.

The product of its digits is 256, while the sum is 24.

The square root of 1181841 is about 1087.1251077958. The cubic root of 1181841 is about 105.7271074747.

The spelling of 1181841 in words is "one million, one hundred eighty-one thousand, eight hundred forty-one".