142043761 has 2 divisors, whose sum is σ = 142043762. Its totient is φ = 142043760.

The previous prime is 142043743. The next prime is 142043771. The reversal of 142043761 is 167340241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138509361 + 3534400 = 11769^2 + 1880^2 .

It is an emirp because it is prime and its reverse (167340241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142043761 - 2²³ = 133655153 is a prime.

It is not a weakly prime, because it can be changed into another prime (142043771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71021880 + 71021881.

It is an arithmetic number, because the mean of its divisors is an integer number (71021881).

Almost surely, 2^142043761 is an apocalyptic number.

It is an amenable number.

142043761 is a deficient number, since it is larger than the sum of its proper divisors (1).

142043761 is an equidigital number, since it uses as much as digits as its factorization.

142043761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 142043761 is about 11918.2113171398. The cubic root of 142043761 is about 521.7639320021.

The spelling of 142043761 in words is "one hundred forty-two million, forty-three thousand, seven hundred sixty-one".