142267931 has 4 divisors (see below), whose sum is σ = 153211632. Its totient is φ = 131324232.

The previous prime is 142267927. The next prime is 142267933. The reversal of 142267931 is 139762241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139762241 = 197 ⋅709453.

It is not a de Polignac number, because 142267931 - 2² = 142267927 is a prime.

It is a super-2 number, since 2×142267931² = 40480328382041522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142267891 and 142267900.

It is not an unprimeable number, because it can be changed into a prime (142267933) 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, 5471831 + ... + 5471856.

It is an arithmetic number, because the mean of its divisors is an integer number (38302908).

Almost surely, 2^142267931 is an apocalyptic number.

142267931 is a deficient number, since it is larger than the sum of its proper divisors (10943701).

142267931 is a wasteful number, since it uses less digits than its factorization.

142267931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10943700.

The product of its digits is 18144, while the sum is 35.

The square root of 142267931 is about 11927.6121248136. The cubic root of 142267931 is about 522.0382661084.

The spelling of 142267931 in words is "one hundred forty-two million, two hundred sixty-seven thousand, nine hundred thirty-one".