142009501 has 2 divisors, whose sum is σ = 142009502. Its totient is φ = 142009500.

The previous prime is 142009493. The next prime is 142009529. The reversal of 142009501 is 105900241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118243876 + 23765625 = 10874^2 + 4875^2 .

It is an emirp because it is prime and its reverse (105900241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142009501 - 2³ = 142009493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142009001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71004750 + 71004751.

It is an arithmetic number, because the mean of its divisors is an integer number (71004751).

Almost surely, 2^142009501 is an apocalyptic number.

It is an amenable number.

142009501 is a deficient number, since it is larger than the sum of its proper divisors (1).

142009501 is an equidigital number, since it uses as much as digits as its factorization.

142009501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 142009501 is about 11916.7739342492. The cubic root of 142009501 is about 521.7219799784.

Adding to 142009501 its reverse (105900241), we get a palindrome (247909742).

The spelling of 142009501 in words is "one hundred forty-two million, nine thousand, five hundred one".