142603621 has 2 divisors, whose sum is σ = 142603622. Its totient is φ = 142603620.

The previous prime is 142603619. The next prime is 142603631. The reversal of 142603621 is 126306241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90041121 + 52562500 = 9489^2 + 7250^2 .

It is a cyclic number.

It is not a de Polignac number, because 142603621 - 2¹ = 142603619 is a prime.

Together with 142603619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142603631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71301810 + 71301811.

It is an arithmetic number, because the mean of its divisors is an integer number (71301811).

Almost surely, 2^142603621 is an apocalyptic number.

It is an amenable number.

142603621 is a deficient number, since it is larger than the sum of its proper divisors (1).

142603621 is an equidigital number, since it uses as much as digits as its factorization.

142603621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 142603621 is about 11941.6758036718. The cubic root of 142603621 is about 522.4485374709.

Adding to 142603621 its reverse (126306241), we get a palindrome (268909862).

The spelling of 142603621 in words is "one hundred forty-two million, six hundred three thousand, six hundred twenty-one".