142477817 has 2 divisors, whose sum is σ = 142477818. Its totient is φ = 142477816.

The previous prime is 142477807. The next prime is 142477837. The reversal of 142477817 is 718774241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80209936 + 62267881 = 8956^2 + 7891^2 .

It is a cyclic number.

It is not a de Polignac number, because 142477817 - 2¹⁸ = 142215673 is a prime.

It is not a weakly prime, because it can be changed into another prime (142477807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71238908 + 71238909.

It is an arithmetic number, because the mean of its divisors is an integer number (71238909).

Almost surely, 2^142477817 is an apocalyptic number.

It is an amenable number.

142477817 is a deficient number, since it is larger than the sum of its proper divisors (1).

142477817 is an equidigital number, since it uses as much as digits as its factorization.

142477817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87808, while the sum is 41.

The square root of 142477817 is about 11936.4072065258. The cubic root of 142477817 is about 522.2948586874.

The spelling of 142477817 in words is "one hundred forty-two million, four hundred seventy-seven thousand, eight hundred seventeen".