8131142 has 4 divisors (see below), whose sum is σ = 12196716. Its totient is φ = 4065570.

The previous prime is 8131139. The next prime is 8131147. The reversal of 8131142 is 2411318.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×8131142² = 132230940448328, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8131147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2032784 + ... + 2032787.

It is an arithmetic number, because the mean of its divisors is an integer number (3049179).

Almost surely, 2^8131142 is an apocalyptic number.

8131142 is a deficient number, since it is larger than the sum of its proper divisors (4065574).

8131142 is a wasteful number, since it uses less digits than its factorization.

8131142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065573.

The product of its digits is 192, while the sum is 20.

The square root of 8131142 is about 2851.5157372878. The cubic root of 8131142 is about 201.0869321910.

The spelling of 8131142 in words is "eight million, one hundred thirty-one thousand, one hundred forty-two".