142275021 has 16 divisors (see below), whose sum is σ = 228211200. Its totient is φ = 77020848.

The previous prime is 142275013. The next prime is 142275037. The reversal of 142275021 is 120572241.

It is not a de Polignac number, because 142275021 - 2³ = 142275013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142274982 and 142275000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142275061) 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, 177891 + ... + 178688.

It is an arithmetic number, because the mean of its divisors is an integer number (14263200).

Almost surely, 2^142275021 is an apocalyptic number.

It is an amenable number.

142275021 is a deficient number, since it is larger than the sum of its proper divisors (85936179).

142275021 is a wasteful number, since it uses less digits than its factorization.

142275021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356608.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 142275021 is about 11927.9093306413. The cubic root of 142275021 is about 522.0469379850.

The spelling of 142275021 in words is "one hundred forty-two million, two hundred seventy-five thousand, twenty-one".