142231493 has 2 divisors, whose sum is σ = 142231494. Its totient is φ = 142231492.

The previous prime is 142231459. The next prime is 142231561. The reversal of 142231493 is 394132241.

142231493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98763844 + 43467649 = 9938^2 + 6593^2 .

It is a cyclic number.

It is not a de Polignac number, because 142231493 - 2²⁶ = 75122629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142231423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71115746 + 71115747.

It is an arithmetic number, because the mean of its divisors is an integer number (71115747).

Almost surely, 2^142231493 is an apocalyptic number.

It is an amenable number.

142231493 is a deficient number, since it is larger than the sum of its proper divisors (1).

142231493 is an equidigital number, since it uses as much as digits as its factorization.

142231493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 142231493 is about 11926.0845628396. The cubic root of 142231493 is about 521.9936937431.

The spelling of 142231493 in words is "one hundred forty-two million, two hundred thirty-one thousand, four hundred ninety-three".