142266931 has 4 divisors (see below), whose sum is σ = 150635592. Its totient is φ = 133898272.

The previous prime is 142266911. The next prime is 142266941. The reversal of 142266931 is 139662241.

It is a happy number.

142266931 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 an emirpimes, since its reverse is a distinct semiprime: 139662241 = 599 ⋅233159.

It is a cyclic number.

It is not a de Polignac number, because 142266931 - 2¹¹ = 142264883 is a prime.

It is a super-2 number, since 2×142266931² = 40479759312317522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142266911) 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, 4184305 + ... + 4184338.

It is an arithmetic number, because the mean of its divisors is an integer number (37658898).

Almost surely, 2^142266931 is an apocalyptic number.

142266931 is a deficient number, since it is larger than the sum of its proper divisors (8368661).

142266931 is an equidigital number, since it uses as much as digits as its factorization.

142266931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8368660.

The product of its digits is 15552, while the sum is 34.

The square root of 142266931 is about 11927.5702052011. The cubic root of 142266931 is about 522.0370429715.

The spelling of 142266931 in words is "one hundred forty-two million, two hundred sixty-six thousand, nine hundred thirty-one".