142563121 has 2 divisors, whose sum is σ = 142563122. Its totient is φ = 142563120.

The previous prime is 142563107. The next prime is 142563133. The reversal of 142563121 is 121365241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140778225 + 1784896 = 11865^2 + 1336^2 .

It is an emirp because it is prime and its reverse (121365241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142563121 - 2¹¹ = 142561073 is a prime.

It is not a weakly prime, because it can be changed into another prime (142563181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71281560 + 71281561.

It is an arithmetic number, because the mean of its divisors is an integer number (71281561).

Almost surely, 2^142563121 is an apocalyptic number.

It is an amenable number.

142563121 is a deficient number, since it is larger than the sum of its proper divisors (1).

142563121 is an equidigital number, since it uses as much as digits as its factorization.

142563121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 142563121 is about 11939.9799413567. The cubic root of 142563121 is about 522.3990736284.

It can be divided in two parts, 1425 and 63121, that added together give a palindrome (64546).

The spelling of 142563121 in words is "one hundred forty-two million, five hundred sixty-three thousand, one hundred twenty-one".