142987291 has 2 divisors, whose sum is σ = 142987292. Its totient is φ = 142987290.

The previous prime is 142987261. The next prime is 142987321. The reversal of 142987291 is 192789241.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (142987261) and next prime (142987321).

It is a cyclic number.

It is not a de Polignac number, because 142987291 - 2⁵ = 142987259 is a prime.

It is not a weakly prime, because it can be changed into another prime (142987211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71493645 + 71493646.

It is an arithmetic number, because the mean of its divisors is an integer number (71493646).

Almost surely, 2^142987291 is an apocalyptic number.

142987291 is a deficient number, since it is larger than the sum of its proper divisors (1).

142987291 is an equidigital number, since it uses as much as digits as its factorization.

142987291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 142987291 is about 11957.7293413089. The cubic root of 142987291 is about 522.9166610040.

The spelling of 142987291 in words is "one hundred forty-two million, nine hundred eighty-seven thousand, two hundred ninety-one".