142425021 has 16 divisors (see below), whose sum is σ = 195427008. Its totient is φ = 92208000.

The previous prime is 142425011. The next prime is 142425043. The reversal of 142425021 is 120524241.

It is not a de Polignac number, because 142425021 - 2⁶ = 142424957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142425011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25371 + ... + 30471.

It is an arithmetic number, because the mean of its divisors is an integer number (12214188).

Almost surely, 2^142425021 is an apocalyptic number.

It is an amenable number.

142425021 is a deficient number, since it is larger than the sum of its proper divisors (53001987).

142425021 is a wasteful number, since it uses less digits than its factorization.

142425021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5372.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 142425021 is about 11934.1954483744. The cubic root of 142425021 is about 522.2303375648.

Adding to 142425021 its reverse (120524241), we get a palindrome (262949262).

The spelling of 142425021 in words is "one hundred forty-two million, four hundred twenty-five thousand, twenty-one".