142533997 has 4 divisors (see below), whose sum is σ = 142746460. Its totient is φ = 142321536.

The previous prime is 142533983. The next prime is 142534009. The reversal of 142533997 is 799335241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 799335241 = 53 ⋅15081797.

It can be written as a sum of positive squares in 2 ways, for example, as 99880036 + 42653961 = 9994^2 + 6531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142533997 is a prime.

It is a super-3 number, since 3×142533997³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142533947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105222 + ... + 106567.

It is an arithmetic number, because the mean of its divisors is an integer number (35686615).

Almost surely, 2^142533997 is an apocalyptic number.

It is an amenable number.

142533997 is a deficient number, since it is larger than the sum of its proper divisors (212463).

142533997 is an equidigital number, since it uses as much as digits as its factorization.

142533997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212462.

The product of its digits is 204120, while the sum is 43.

The square root of 142533997 is about 11938.7602790239. The cubic root of 142533997 is about 522.3634978388.

The spelling of 142533997 in words is "one hundred forty-two million, five hundred thirty-three thousand, nine hundred ninety-seven".