142809133 has 4 divisors (see below), whose sum is σ = 144413820. Its totient is φ = 141204448.

The previous prime is 142809131. The next prime is 142809179. The reversal of 142809133 is 331908241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74960964 + 67848169 = 8658^2 + 8237^2 .

It is a cyclic number.

It is not a de Polignac number, because 142809133 - 2¹ = 142809131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142809095 and 142809104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142809131) 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, 802210 + ... + 802387.

It is an arithmetic number, because the mean of its divisors is an integer number (36103455).

Almost surely, 2^142809133 is an apocalyptic number.

It is an amenable number.

142809133 is a deficient number, since it is larger than the sum of its proper divisors (1604687).

142809133 is an equidigital number, since it uses as much as digits as its factorization.

142809133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604686.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 142809133 is about 11950.2775281581. The cubic root of 142809133 is about 522.6993910985.

The spelling of 142809133 in words is "one hundred forty-two million, eight hundred nine thousand, one hundred thirty-three".