142047761 has 2 divisors, whose sum is σ = 142047762. Its totient is φ = 142047760.

The previous prime is 142047757. The next prime is 142047769. The reversal of 142047761 is 167740241.

142047761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131446225 + 10601536 = 11465^2 + 3256^2 .

It is a cyclic number.

It is not a de Polignac number, because 142047761 - 2² = 142047757 is a prime.

It is a super-2 number, since 2×142047761² = 40355132810226242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (142047769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71023880 + 71023881.

It is an arithmetic number, because the mean of its divisors is an integer number (71023881).

Almost surely, 2^142047761 is an apocalyptic number.

It is an amenable number.

142047761 is a deficient number, since it is larger than the sum of its proper divisors (1).

142047761 is an equidigital number, since it uses as much as digits as its factorization.

142047761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 142047761 is about 11918.3791263745. The cubic root of 142047761 is about 521.7688296386.

The spelling of 142047761 in words is "one hundred forty-two million, forty-seven thousand, seven hundred sixty-one".