142449186 has 48 divisors (see below), whose sum is σ = 321676992. Its totient is φ = 41991840.

The previous prime is 142449173. The next prime is 142449227. The reversal of 142449186 is 681944241.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 24211 + ... + 29513.

It is an arithmetic number, because the mean of its divisors is an integer number (6701604).

Almost surely, 2^142449186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142449186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160838496).

142449186 is an abundant number, since it is smaller than the sum of its proper divisors (179227806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142449186 is a wasteful number, since it uses less digits than its factorization.

142449186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5367 (or 5356 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 142449186 is about 11935.2078322918. The cubic root of 142449186 is about 522.2598711921.

The spelling of 142449186 in words is "one hundred forty-two million, four hundred forty-nine thousand, one hundred eighty-six".