142521121 has 2 divisors, whose sum is σ = 142521122. Its totient is φ = 142521120.

The previous prime is 142521103. The next prime is 142521139. The reversal of 142521121 is 121125241.

142521121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (142521103) and next prime (142521139).

It can be written as a sum of positive squares in only one way, i.e., 91470096 + 51051025 = 9564^2 + 7145^2 .

It is an emirp because it is prime and its reverse (121125241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142521121 - 2⁵ = 142521089 is a prime.

It is not a weakly prime, because it can be changed into another prime (142521101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71260560 + 71260561.

It is an arithmetic number, because the mean of its divisors is an integer number (71260561).

Almost surely, 2^142521121 is an apocalyptic number.

It is an amenable number.

142521121 is a deficient number, since it is larger than the sum of its proper divisors (1).

142521121 is an equidigital number, since it uses as much as digits as its factorization.

142521121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160, while the sum is 19.

The square root of 142521121 is about 11938.2210148749. The cubic root of 142521121 is about 522.3477678958.

Adding to 142521121 its reverse (121125241), we get a palindrome (263646362).

It can be divided in two parts, 14 and 2521121, that added together give a triangular number (2521135 = T₂₂₄₅).

The spelling of 142521121 in words is "one hundred forty-two million, five hundred twenty-one thousand, one hundred twenty-one".