142030621 has 2 divisors, whose sum is σ = 142030622. Its totient is φ = 142030620.

The previous prime is 142030517. The next prime is 142030633. The reversal of 142030621 is 126030241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140304025 + 1726596 = 11845^2 + 1314^2 .

It is an emirp because it is prime and its reverse (126030241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142030621 - 2²³ = 133642013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142030321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71015310 + 71015311.

It is an arithmetic number, because the mean of its divisors is an integer number (71015311).

Almost surely, 2^142030621 is an apocalyptic number.

It is an amenable number.

142030621 is a deficient number, since it is larger than the sum of its proper divisors (1).

142030621 is an equidigital number, since it uses as much as digits as its factorization.

142030621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 142030621 is about 11917.6600471737. The cubic root of 142030621 is about 521.7478426189.

Adding to 142030621 its reverse (126030241), we get a palindrome (268060862).

It can be divided in two parts, 1420 and 30621, that added together give a square (32041 = 179²).

The spelling of 142030621 in words is "one hundred forty-two million, thirty thousand, six hundred twenty-one".