142733391 has 8 divisors (see below), whose sum is σ = 190999344. Its totient is φ = 94811520.

The previous prime is 142733333. The next prime is 142733417. The reversal of 142733391 is 193337241.

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

It is not a de Polignac number, because 142733391 - 2⁹ = 142732879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142733891) 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, 85050 + ... + 86711.

It is an arithmetic number, because the mean of its divisors is an integer number (23874918).

Almost surely, 2^142733391 is an apocalyptic number.

142733391 is a deficient number, since it is larger than the sum of its proper divisors (48265953).

142733391 is a wasteful number, since it uses less digits than its factorization.

142733391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172041.

The product of its digits is 13608, while the sum is 33.

The square root of 142733391 is about 11947.1080601123. The cubic root of 142733391 is about 522.6069663408.

The spelling of 142733391 in words is "one hundred forty-two million, seven hundred thirty-three thousand, three hundred ninety-one".