142178459 has 4 divisors (see below), whose sum is σ = 142296504. Its totient is φ = 142060416.

The previous prime is 142178453. The next prime is 142178467. The reversal of 142178459 is 954871241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954871241 = 13859 ⋅68899.

It is a cyclic number.

It is not a de Polignac number, because 142178459 - 2²⁰ = 141129883 is a prime.

It is a super-2 number, since 2×142178459² = 40429428407229362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142178453) 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, 57197 + ... + 59630.

It is an arithmetic number, because the mean of its divisors is an integer number (35574126).

Almost surely, 2^142178459 is an apocalyptic number.

142178459 is a deficient number, since it is larger than the sum of its proper divisors (118045).

142178459 is a wasteful number, since it uses less digits than its factorization.

142178459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118044.

The product of its digits is 80640, while the sum is 41.

The square root of 142178459 is about 11923.8609099570. The cubic root of 142178459 is about 521.9288069063.

The spelling of 142178459 in words is "one hundred forty-two million, one hundred seventy-eight thousand, four hundred fifty-nine".