142431409 has 2 divisors, whose sum is σ = 142431410. Its totient is φ = 142431408.

The previous prime is 142431379. The next prime is 142431427. The reversal of 142431409 is 904134241.

142431409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132319009 + 10112400 = 11503^2 + 3180^2 .

It is a cyclic number.

It is not a de Polignac number, because 142431409 - 2²³ = 134042801 is a prime.

It is equal to p_8041771 and since 142431409 and 8041771 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (142431439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71215704 + 71215705.

It is an arithmetic number, because the mean of its divisors is an integer number (71215705).

Almost surely, 2^142431409 is an apocalyptic number.

It is an amenable number.

142431409 is a deficient number, since it is larger than the sum of its proper divisors (1).

142431409 is an equidigital number, since it uses as much as digits as its factorization.

142431409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 142431409 is about 11934.4630796697. The cubic root of 142431409 is about 522.2381450823.

The spelling of 142431409 in words is "one hundred forty-two million, four hundred thirty-one thousand, four hundred nine".