142716991 has 2 divisors, whose sum is σ = 142716992. Its totient is φ = 142716990.

The previous prime is 142716979. The next prime is 142717019. The reversal of 142716991 is 199617241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142716991 - 2²¹ = 140619839 is a prime.

It is a super-4 number, since 4×142716991⁴ (a number of 34 digits) contains 4444 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142716191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71358495 + 71358496.

It is an arithmetic number, because the mean of its divisors is an integer number (71358496).

Almost surely, 2^142716991 is an apocalyptic number.

142716991 is a deficient number, since it is larger than the sum of its proper divisors (1).

142716991 is an equidigital number, since it uses as much as digits as its factorization.

142716991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

The square root of 142716991 is about 11946.4216818259. The cubic root of 142716991 is about 522.5869498087.

The spelling of 142716991 in words is "one hundred forty-two million, seven hundred sixteen thousand, nine hundred ninety-one".