142525221 has 12 divisors (see below), whose sum is σ = 195314112. Its totient is φ = 92446128.

The previous prime is 142525189. The next prime is 142525237. The reversal of 142525221 is 122525241.

142525221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142525221 - 2⁵ = 142525189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 142525191 and 142525200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142525121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13245 + ... + 21458.

It is an arithmetic number, because the mean of its divisors is an integer number (16276176).

Almost surely, 2^142525221 is an apocalyptic number.

It is an amenable number.

142525221 is a deficient number, since it is larger than the sum of its proper divisors (52788891).

142525221 is an equidigital number, since it uses as much as digits as its factorization.

142525221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34780 (or 34743 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 142525221 is about 11938.3927310170. The cubic root of 142525221 is about 522.3527767565.

The spelling of 142525221 in words is "one hundred forty-two million, five hundred twenty-five thousand, two hundred twenty-one".