142435661 has 2 divisors, whose sum is σ = 142435662. Its totient is φ = 142435660.

The previous prime is 142435633. The next prime is 142435679. The reversal of 142435661 is 166534241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140873161 + 1562500 = 11869^2 + 1250^2 .

It is an emirp because it is prime and its reverse (166534241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142435661 - 2¹⁰ = 142434637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142435621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71217830 + 71217831.

It is an arithmetic number, because the mean of its divisors is an integer number (71217831).

Almost surely, 2^142435661 is an apocalyptic number.

It is an amenable number.

142435661 is a deficient number, since it is larger than the sum of its proper divisors (1).

142435661 is an equidigital number, since it uses as much as digits as its factorization.

142435661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 142435661 is about 11934.6412179001. The cubic root of 142435661 is about 522.2433418164.

The spelling of 142435661 in words is "one hundred forty-two million, four hundred thirty-five thousand, six hundred sixty-one".