142390757 has 2 divisors, whose sum is σ = 142390758. Its totient is φ = 142390756.

The previous prime is 142390697. The next prime is 142390811. The reversal of 142390757 is 757093241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141467236 + 923521 = 11894^2 + 961^2 .

It is an emirp because it is prime and its reverse (757093241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142390757 - 2¹⁶ = 142325221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142390757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142330757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71195378 + 71195379.

It is an arithmetic number, because the mean of its divisors is an integer number (71195379).

Almost surely, 2^142390757 is an apocalyptic number.

It is an amenable number.

142390757 is a deficient number, since it is larger than the sum of its proper divisors (1).

142390757 is an equidigital number, since it uses as much as digits as its factorization.

142390757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 142390757 is about 11932.7598232764. The cubic root of 142390757 is about 522.1884555620.

The spelling of 142390757 in words is "one hundred forty-two million, three hundred ninety thousand, seven hundred fifty-seven".