142263721 has 2 divisors, whose sum is σ = 142263722. Its totient is φ = 142263720.

The previous prime is 142263683. The next prime is 142263757. The reversal of 142263721 is 127362241.

142263721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115885225 + 26378496 = 10765^2 + 5136^2 .

It is a cyclic number.

It is not a de Polignac number, because 142263721 - 2¹⁷ = 142132649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142263721.

It is not a weakly prime, because it can be changed into another prime (142263761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71131860 + 71131861.

It is an arithmetic number, because the mean of its divisors is an integer number (71131861).

Almost surely, 2^142263721 is an apocalyptic number.

It is an amenable number.

142263721 is a deficient number, since it is larger than the sum of its proper divisors (1).

142263721 is an equidigital number, since it uses as much as digits as its factorization.

142263721 is an evil number, because the sum of its binary digits is even.

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

The square root of 142263721 is about 11927.4356422493. The cubic root of 142263721 is about 522.0331166631.

The spelling of 142263721 in words is "one hundred forty-two million, two hundred sixty-three thousand, seven hundred twenty-one".