142265021 has 2 divisors, whose sum is σ = 142265022. Its totient is φ = 142265020.

The previous prime is 142264943. The next prime is 142265023. The reversal of 142265021 is 120562241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79459396 + 62805625 = 8914^2 + 7925^2 .

It is an emirp because it is prime and its reverse (120562241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142265021 - 2¹⁰ = 142263997 is a prime.

Together with 142265023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142265023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71132510 + 71132511.

It is an arithmetic number, because the mean of its divisors is an integer number (71132511).

Almost surely, 2^142265021 is an apocalyptic number.

It is an amenable number.

142265021 is a deficient number, since it is larger than the sum of its proper divisors (1).

142265021 is an equidigital number, since it uses as much as digits as its factorization.

142265021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 142265021 is about 11927.4901383317. The cubic root of 142265021 is about 522.0347067640.

The spelling of 142265021 in words is "one hundred forty-two million, two hundred sixty-five thousand, twenty-one".