142111031 has 4 divisors (see below), whose sum is σ = 142187232. Its totient is φ = 142034832.

The previous prime is 142111019. The next prime is 142111063. The reversal of 142111031 is 130111241.

142111031 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.

It is a cyclic number.

It is not a de Polignac number, because 142111031 - 2¹⁴ = 142094647 is a prime.

It is a super-2 number, since 2×142111031² = 40391090263765922, 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 = 142110997 and 142111015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142111091) 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, 35231 + ... + 39056.

It is an arithmetic number, because the mean of its divisors is an integer number (35546808).

Almost surely, 2^142111031 is an apocalyptic number.

142111031 is a deficient number, since it is larger than the sum of its proper divisors (76201).

142111031 is an equidigital number, since it uses as much as digits as its factorization.

142111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76200.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 142111031 is about 11921.0331347581. The cubic root of 142111031 is about 521.8462857784.

Adding to 142111031 its reverse (130111241), we get a palindrome (272222272).

The spelling of 142111031 in words is "one hundred forty-two million, one hundred eleven thousand, thirty-one".