142010391 has 4 divisors (see below), whose sum is σ = 189347192. Its totient is φ = 94673592.

The previous prime is 142010387. The next prime is 142010399. The reversal of 142010391 is 193010241.

142010391 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 not a de Polignac number, because 142010391 - 2² = 142010387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142010399) 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, 23668396 + ... + 23668401.

It is an arithmetic number, because the mean of its divisors is an integer number (47336798).

Almost surely, 2^142010391 is an apocalyptic number.

142010391 is a deficient number, since it is larger than the sum of its proper divisors (47336801).

142010391 is an equidigital number, since it uses as much as digits as its factorization.

142010391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47336800.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 142010391 is about 11916.8112765119. The cubic root of 142010391 is about 521.7230698858.

It can be divided in two parts, 1420 and 10391, that added together give a palindrome (11811).

The spelling of 142010391 in words is "one hundred forty-two million, ten thousand, three hundred ninety-one".