8381145 has 16 divisors (see below), whose sum is σ = 13872960. Its totient is φ = 4315584.

The previous prime is 8381143. The next prime is 8381159. The reversal of 8381145 is 5411838.

It is not a de Polignac number, because 8381145 - 2¹ = 8381143 is a prime.

It is a super-2 number, since 2×8381145² = 140487183022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8381143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9199 + ... + 10068.

It is an arithmetic number, because the mean of its divisors is an integer number (867060).

Almost surely, 2^8381145 is an apocalyptic number.

It is an amenable number.

8381145 is a deficient number, since it is larger than the sum of its proper divisors (5491815).

8381145 is a wasteful number, since it uses less digits than its factorization.

8381145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19304.

The product of its digits is 3840, while the sum is 30.

The square root of 8381145 is about 2895.0207253144. The cubic root of 8381145 is about 203.1270609653.

The spelling of 8381145 in words is "eight million, three hundred eighty-one thousand, one hundred forty-five".