142045991 has 2 divisors, whose sum is σ = 142045992. Its totient is φ = 142045990.

The previous prime is 142045979. The next prime is 142045993. The reversal of 142045991 is 199540241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142045991 - 2¹⁰ = 142044967 is a prime.

Together with 142045993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142045993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71022995 + 71022996.

It is an arithmetic number, because the mean of its divisors is an integer number (71022996).

Almost surely, 2^142045991 is an apocalyptic number.

142045991 is a deficient number, since it is larger than the sum of its proper divisors (1).

142045991 is an equidigital number, since it uses as much as digits as its factorization.

142045991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 142045991 is about 11918.3048710796. The cubic root of 142045991 is about 521.7666624458.

The spelling of 142045991 in words is "one hundred forty-two million, forty-five thousand, nine hundred ninety-one".