142197259 has 4 divisors (see below), whose sum is σ = 145504216. Its totient is φ = 138890304.

The previous prime is 142197239. The next prime is 142197271. The reversal of 142197259 is 952791241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142197259 - 2⁵ = 142197227 is a prime.

It is a super-2 number, since 2×142197259² = 40440120934226162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142197229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653414 + ... + 1653499.

It is an arithmetic number, because the mean of its divisors is an integer number (36376054).

Almost surely, 2^142197259 is an apocalyptic number.

142197259 is a deficient number, since it is larger than the sum of its proper divisors (3306957).

142197259 is an equidigital number, since it uses as much as digits as its factorization.

142197259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3306956.

The product of its digits is 45360, while the sum is 40.

The square root of 142197259 is about 11924.6492191594. The cubic root of 142197259 is about 521.9518104592.

The spelling of 142197259 in words is "one hundred forty-two million, one hundred ninety-seven thousand, two hundred fifty-nine".