8142149 has 4 divisors (see below), whose sum is σ = 8340780. Its totient is φ = 7943520.

The previous prime is 8142137. The next prime is 8142151. The reversal of 8142149 is 9412418.

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 2829124 + 5313025 = 1682^2 + 2305^2 .

It is a cyclic number.

It is not a de Polignac number, because 8142149 - 2⁸ = 8141893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8142049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99254 + ... + 99335.

It is an arithmetic number, because the mean of its divisors is an integer number (2085195).

Almost surely, 2^8142149 is an apocalyptic number.

It is an amenable number.

8142149 is a deficient number, since it is larger than the sum of its proper divisors (198631).

8142149 is a wasteful number, since it uses less digits than its factorization.

8142149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198630.

The product of its digits is 2304, while the sum is 29.

The square root of 8142149 is about 2853.4451107389. The cubic root of 8142149 is about 201.1776273595.

The spelling of 8142149 in words is "eight million, one hundred forty-two thousand, one hundred forty-nine".