142544291 has 4 divisors (see below), whose sum is σ = 142654992. Its totient is φ = 142433592.

The previous prime is 142544287. The next prime is 142544329. The reversal of 142544291 is 192445241.

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 142544291 - 2² = 142544287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142544221) 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, 53396 + ... + 56001.

It is an arithmetic number, because the mean of its divisors is an integer number (35663748).

Almost surely, 2^142544291 is an apocalyptic number.

142544291 is a deficient number, since it is larger than the sum of its proper divisors (110701).

142544291 is a wasteful number, since it uses less digits than its factorization.

142544291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110700.

The product of its digits is 11520, while the sum is 32.

The square root of 142544291 is about 11939.1913880296. The cubic root of 142544291 is about 522.3760728046.

The spelling of 142544291 in words is "one hundred forty-two million, five hundred forty-four thousand, two hundred ninety-one".