142365121 has 2 divisors, whose sum is σ = 142365122. Its totient is φ = 142365120.

The previous prime is 142365109. The next prime is 142365143. The reversal of 142365121 is 121563241.

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., 76755121 + 65610000 = 8761^2 + 8100^2 .

It is a cyclic number.

It is not a de Polignac number, because 142365121 - 2⁹ = 142364609 is a prime.

It is not a weakly prime, because it can be changed into another prime (142363121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71182560 + 71182561.

It is an arithmetic number, because the mean of its divisors is an integer number (71182561).

Almost surely, 2^142365121 is an apocalyptic number.

It is an amenable number.

142365121 is a deficient number, since it is larger than the sum of its proper divisors (1).

142365121 is an equidigital number, since it uses as much as digits as its factorization.

142365121 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 142365121 is about 11931.6855892200. The cubic root of 142365121 is about 522.1571154502.

The spelling of 142365121 in words is "one hundred forty-two million, three hundred sixty-five thousand, one hundred twenty-one".