142617493 has 2 divisors, whose sum is σ = 142617494. Its totient is φ = 142617492.

The previous prime is 142617481. The next prime is 142617509. The reversal of 142617493 is 394716241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84217329 + 58400164 = 9177^2 + 7642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142617493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142617793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71308746 + 71308747.

It is an arithmetic number, because the mean of its divisors is an integer number (71308747).

Almost surely, 2^142617493 is an apocalyptic number.

It is an amenable number.

142617493 is a deficient number, since it is larger than the sum of its proper divisors (1).

142617493 is an equidigital number, since it uses as much as digits as its factorization.

142617493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 142617493 is about 11942.2566125502. The cubic root of 142617493 is about 522.4654775998.

The spelling of 142617493 in words is "one hundred forty-two million, six hundred seventeen thousand, four hundred ninety-three".