142581697 has 2 divisors, whose sum is σ = 142581698. Its totient is φ = 142581696.

The previous prime is 142581653. The next prime is 142581739. The reversal of 142581697 is 796185241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131882256 + 10699441 = 11484^2 + 3271^2 .

It is a cyclic number.

It is not a de Polignac number, because 142581697 - 2²³ = 134193089 is a prime.

It is not a weakly prime, because it can be changed into another prime (142581497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71290848 + 71290849.

It is an arithmetic number, because the mean of its divisors is an integer number (71290849).

Almost surely, 2^142581697 is an apocalyptic number.

It is an amenable number.

142581697 is a deficient number, since it is larger than the sum of its proper divisors (1).

142581697 is an equidigital number, since it uses as much as digits as its factorization.

142581697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 142581697 is about 11940.7578067726. The cubic root of 142581697 is about 522.4217622070.

It can be divided in two parts, 14258169 and 7, that added together give a square (14258176 = 3776²).

The spelling of 142581697 in words is "one hundred forty-two million, five hundred eighty-one thousand, six hundred ninety-seven".