142707421 has 2 divisors, whose sum is σ = 142707422. Its totient is φ = 142707420.

The previous prime is 142707419. The next prime is 142707437. The reversal of 142707421 is 124707241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105801796 + 36905625 = 10286^2 + 6075^2 .

It is a cyclic number.

It is not a de Polignac number, because 142707421 - 2¹ = 142707419 is a prime.

Together with 142707419, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 142707421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142707451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71353710 + 71353711.

It is an arithmetic number, because the mean of its divisors is an integer number (71353711).

Almost surely, 2^142707421 is an apocalyptic number.

It is an amenable number.

142707421 is a deficient number, since it is larger than the sum of its proper divisors (1).

142707421 is an equidigital number, since it uses as much as digits as its factorization.

142707421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 142707421 is about 11946.0211367635. The cubic root of 142707421 is about 522.5752687214.

The spelling of 142707421 in words is "one hundred forty-two million, seven hundred seven thousand, four hundred twenty-one".