142244391 has 16 divisors (see below), whose sum is σ = 201506400. Its totient is φ = 89083008.

The previous prime is 142244359. The next prime is 142244407. The reversal of 142244391 is 193442241.

It is not a de Polignac number, because 142244391 - 2⁵ = 142244359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142248391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18876 + ... + 25313.

It is an arithmetic number, because the mean of its divisors is an integer number (12594150).

Almost surely, 2^142244391 is an apocalyptic number.

142244391 is a deficient number, since it is larger than the sum of its proper divisors (59262009).

142244391 is a wasteful number, since it uses less digits than its factorization.

142244391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44258.

The product of its digits is 6912, while the sum is 30.

The square root of 142244391 is about 11926.6252980464. The cubic root of 142244391 is about 522.0094719439.

The spelling of 142244391 in words is "one hundred forty-two million, two hundred forty-four thousand, three hundred ninety-one".