142501421 has 2 divisors, whose sum is σ = 142501422. Its totient is φ = 142501420.

The previous prime is 142501417. The next prime is 142501453. The reversal of 142501421 is 124105241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124768900 + 17732521 = 11170^2 + 4211^2 .

It is a cyclic number.

It is not a de Polignac number, because 142501421 - 2² = 142501417 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 142501393 and 142501402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142506421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71250710 + 71250711.

It is an arithmetic number, because the mean of its divisors is an integer number (71250711).

Almost surely, 2^142501421 is an apocalyptic number.

It is an amenable number.

142501421 is a deficient number, since it is larger than the sum of its proper divisors (1).

142501421 is an equidigital number, since it uses as much as digits as its factorization.

142501421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 142501421 is about 11937.3959053053. The cubic root of 142501421 is about 522.3236995914.

Adding to 142501421 its reverse (124105241), we get a palindrome (266606662).

The spelling of 142501421 in words is "one hundred forty-two million, five hundred one thousand, four hundred twenty-one".