142299991 has 2 divisors, whose sum is σ = 142299992. Its totient is φ = 142299990.

The previous prime is 142299967. The next prime is 142300003. The reversal of 142299991 is 199992241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142299991 - 2⁷ = 142299863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142299961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71149995 + 71149996.

It is an arithmetic number, because the mean of its divisors is an integer number (71149996).

Almost surely, 2^142299991 is an apocalyptic number.

142299991 is a deficient number, since it is larger than the sum of its proper divisors (1).

142299991 is an equidigital number, since it uses as much as digits as its factorization.

142299991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 46.

The square root of 142299991 is about 11928.9559895240. The cubic root of 142299991 is about 522.0774768419.

The spelling of 142299991 in words is "one hundred forty-two million, two hundred ninety-nine thousand, nine hundred ninety-one".