142991853 has 8 divisors (see below), whose sum is σ = 200690400. Its totient is φ = 90310608.

The previous prime is 142991833. The next prime is 142991881. The reversal of 142991853 is 358199241.

142991853 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142991853 - 2⁶ = 142991789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142991803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1254258 + ... + 1254371.

It is an arithmetic number, because the mean of its divisors is an integer number (25086300).

Almost surely, 2^142991853 is an apocalyptic number.

It is an amenable number.

142991853 is a deficient number, since it is larger than the sum of its proper divisors (57698547).

142991853 is a wasteful number, since it uses less digits than its factorization.

142991853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508651.

The product of its digits is 77760, while the sum is 42.

The square root of 142991853 is about 11957.9200950667. The cubic root of 142991853 is about 522.9222221519.

The spelling of 142991853 in words is "one hundred forty-two million, nine hundred ninety-one thousand, eight hundred fifty-three".