142097911 has 4 divisors (see below), whose sum is σ = 142135000. Its totient is φ = 142060824.

The previous prime is 142097899. The next prime is 142097939. The reversal of 142097911 is 119790241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 119790241 = 941 ⋅127301.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142097911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142097971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12036 + ... + 20713.

It is an arithmetic number, because the mean of its divisors is an integer number (35533750).

Almost surely, 2^142097911 is an apocalyptic number.

142097911 is a deficient number, since it is larger than the sum of its proper divisors (37089).

142097911 is an equidigital number, since it uses as much as digits as its factorization.

142097911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37088.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 142097911 is about 11920.4828341808. The cubic root of 142097911 is about 521.8302259554.

The spelling of 142097911 in words is "one hundred forty-two million, ninety-seven thousand, nine hundred eleven".