142667939 has 4 divisors (see below), whose sum is σ = 143091624. Its totient is φ = 142244256.

The previous prime is 142667929. The next prime is 142667963. The reversal of 142667939 is 939766241.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 142667939 - 2⁸ = 142667683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142667893 and 142667902.

It is not an unprimeable number, because it can be changed into a prime (142667909) 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, 211337 + ... + 212010.

It is an arithmetic number, because the mean of its divisors is an integer number (35772906).

Almost surely, 2^142667939 is an apocalyptic number.

142667939 is a deficient number, since it is larger than the sum of its proper divisors (423685).

142667939 is an equidigital number, since it uses as much as digits as its factorization.

142667939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423684.

The product of its digits is 489888, while the sum is 47.

The square root of 142667939 is about 11944.3685057018. The cubic root of 142667939 is about 522.5270716955.

The spelling of 142667939 in words is "one hundred forty-two million, six hundred sixty-seven thousand, nine hundred thirty-nine".