142658991 has 12 divisors (see below), whose sum is σ = 209556360. Its totient is φ = 93493680.

The previous prime is 142658983. The next prime is 142659029. The reversal of 142658991 is 199856241.

It is not a de Polignac number, because 142658991 - 2³ = 142658983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142658941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133800 + ... + 134861.

It is an arithmetic number, because the mean of its divisors is an integer number (17463030).

Almost surely, 2^142658991 is an apocalyptic number.

142658991 is a deficient number, since it is larger than the sum of its proper divisors (66897369).

142658991 is a wasteful number, since it uses less digits than its factorization.

142658991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268726 (or 268723 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 142658991 is about 11943.9939300052. The cubic root of 142658991 is about 522.5161473303.

The spelling of 142658991 in words is "one hundred forty-two million, six hundred fifty-eight thousand, nine hundred ninety-one".