142386031 has 4 divisors (see below), whose sum is σ = 148576752. Its totient is φ = 136195312.

The previous prime is 142386011. The next prime is 142386043. The reversal of 142386031 is 130683241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130683241 = 13 ⋅10052557.

It is a cyclic number.

It is not a de Polignac number, because 142386031 - 2¹⁹ = 141861743 is a prime.

It is a super-2 number, since 2×142386031² = 40547563647865922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142386001) 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, 3095326 + ... + 3095371.

It is an arithmetic number, because the mean of its divisors is an integer number (37144188).

Almost surely, 2^142386031 is an apocalyptic number.

142386031 is a deficient number, since it is larger than the sum of its proper divisors (6190721).

142386031 is an equidigital number, since it uses as much as digits as its factorization.

142386031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6190720.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 142386031 is about 11932.5617953564. The cubic root of 142386031 is about 522.1826782910.

The spelling of 142386031 in words is "one hundred forty-two million, three hundred eighty-six thousand, thirty-one".