142520789 has 2 divisors, whose sum is σ = 142520790. Its totient is φ = 142520788.

The previous prime is 142520783. The next prime is 142520801. The reversal of 142520789 is 987025241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96687889 + 45832900 = 9833^2 + 6770^2 .

It is a cyclic number.

It is not a de Polignac number, because 142520789 - 2¹⁶ = 142455253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142520783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71260394 + 71260395.

It is an arithmetic number, because the mean of its divisors is an integer number (71260395).

Almost surely, 2^142520789 is an apocalyptic number.

It is an amenable number.

142520789 is a deficient number, since it is larger than the sum of its proper divisors (1).

142520789 is an equidigital number, since it uses as much as digits as its factorization.

142520789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 142520789 is about 11938.2071099475. The cubic root of 142520789 is about 522.3473622961.

The spelling of 142520789 in words is "one hundred forty-two million, five hundred twenty thousand, seven hundred eighty-nine".