142811777 has 2 divisors, whose sum is σ = 142811778. Its totient is φ = 142811776.

The previous prime is 142811741. The next prime is 142811789. The reversal of 142811777 is 777118241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134768881 + 8042896 = 11609^2 + 2836^2 .

It is a cyclic number.

It is not a de Polignac number, because 142811777 - 2¹⁰ = 142810753 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142811777.

It is not a weakly prime, because it can be changed into another prime (142811717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71405888 + 71405889.

It is an arithmetic number, because the mean of its divisors is an integer number (71405889).

Almost surely, 2^142811777 is an apocalyptic number.

It is an amenable number.

142811777 is a deficient number, since it is larger than the sum of its proper divisors (1).

142811777 is an equidigital number, since it uses as much as digits as its factorization.

142811777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21952, while the sum is 38.

The square root of 142811777 is about 11950.3881526919. The cubic root of 142811777 is about 522.7026168695.

The spelling of 142811777 in words is "one hundred forty-two million, eight hundred eleven thousand, seven hundred seventy-seven".