142722001 has 2 divisors, whose sum is σ = 142722002. Its totient is φ = 142722000.

The previous prime is 142721983. The next prime is 142722037. The reversal of 142722001 is 100227241.

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., 142181776 + 540225 = 11924^2 + 735^2 .

It is an emirp because it is prime and its reverse (100227241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142722001 - 2¹¹ = 142719953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142722001.

It is not a weakly prime, because it can be changed into another prime (142722071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71361000 + 71361001.

It is an arithmetic number, because the mean of its divisors is an integer number (71361001).

Almost surely, 2^142722001 is an apocalyptic number.

It is an amenable number.

142722001 is a deficient number, since it is larger than the sum of its proper divisors (1).

142722001 is an equidigital number, since it uses as much as digits as its factorization.

142722001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 142722001 is about 11946.6313662053. The cubic root of 142722001 is about 522.5930647778.

Adding to 142722001 its reverse (100227241), we get a palindrome (242949242).

The spelling of 142722001 in words is "one hundred forty-two million, seven hundred twenty-two thousand, one".