142825811 has 4 divisors (see below), whose sum is σ = 142849800. Its totient is φ = 142801824.

The previous prime is 142825799. The next prime is 142825849. The reversal of 142825811 is 118528241.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 118528241 = 13 ⋅9117557.

It is a cyclic number.

It is not a de Polignac number, because 142825811 - 2¹⁸ = 142563667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142825411) 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, 4475 + ... + 17483.

It is an arithmetic number, because the mean of its divisors is an integer number (35712450).

Almost surely, 2^142825811 is an apocalyptic number.

142825811 is a deficient number, since it is larger than the sum of its proper divisors (23989).

142825811 is a wasteful number, since it uses less digits than its factorization.

142825811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23988.

The product of its digits is 5120, while the sum is 32.

The square root of 142825811 is about 11950.9753158477. The cubic root of 142825811 is about 522.7197381658.

The spelling of 142825811 in words is "one hundred forty-two million, eight hundred twenty-five thousand, eight hundred eleven".