11645381 has 4 divisors (see below), whose sum is σ = 12704064. Its totient is φ = 10586700.

The previous prime is 11645371. The next prime is 11645407. The reversal of 11645381 is 18354611.

11645381 is digitally balanced in base 2, 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.

It is a cyclic number.

It is not a de Polignac number, because 11645381 - 2⁶ = 11645317 is a prime.

It is a super-2 number, since 2×11645381² = 271229797270322, 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 (11645341) 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, 529325 + ... + 529346.

It is an arithmetic number, because the mean of its divisors is an integer number (3176016).

Almost surely, 2^11645381 is an apocalyptic number.

11645381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11645381 is a deficient number, since it is larger than the sum of its proper divisors (1058683).

11645381 is a wasteful number, since it uses less digits than its factorization.

11645381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058682.

The product of its digits is 2880, while the sum is 29.

The square root of 11645381 is about 3412.5329302440. The cubic root of 11645381 is about 226.6650535737.

Adding to 11645381 its reverse (18354611), we get a palindrome (29999992).

The spelling of 11645381 in words is "eleven million, six hundred forty-five thousand, three hundred eighty-one".