11345981 has 4 divisors (see below), whose sum is σ = 11515392. Its totient is φ = 11176572.

The previous prime is 11345977. The next prime is 11346001. The reversal of 11345981 is 18954311.

11345981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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: 18954311 = 2963 ⋅6397.

It is a cyclic number.

It is not a de Polignac number, because 11345981 - 2² = 11345977 is a prime.

It is a super-2 number, since 2×11345981² = 257462569704722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11345911) 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, 84605 + ... + 84738.

It is an arithmetic number, because the mean of its divisors is an integer number (2878848).

Almost surely, 2^11345981 is an apocalyptic number.

It is an amenable number.

11345981 is a deficient number, since it is larger than the sum of its proper divisors (169411).

11345981 is an equidigital number, since it uses as much as digits as its factorization.

11345981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169410.

The product of its digits is 4320, while the sum is 32.

The square root of 11345981 is about 3368.3795807480. The cubic root of 11345981 is about 224.7056628630.

The spelling of 11345981 in words is "eleven million, three hundred forty-five thousand, nine hundred eighty-one".