142097961 has 4 divisors (see below), whose sum is σ = 189463952. Its totient is φ = 94731972.

The previous prime is 142097957. The next prime is 142097971. The reversal of 142097961 is 169790241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 169790241 = 3 ⋅56596747.

It is not a de Polignac number, because 142097961 - 2² = 142097957 is a prime.

It is a Duffinian 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23682991 + ... + 23682996.

It is an arithmetic number, because the mean of its divisors is an integer number (47365988).

Almost surely, 2^142097961 is an apocalyptic number.

It is an amenable number.

142097961 is a deficient number, since it is larger than the sum of its proper divisors (47365991).

142097961 is an equidigital number, since it uses as much as digits as its factorization.

142097961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47365990.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 142097961 is about 11920.4849314111. The cubic root of 142097961 is about 521.8302871609.

The spelling of 142097961 in words is "one hundred forty-two million, ninety-seven thousand, nine hundred sixty-one".