142449187 has 4 divisors (see below), whose sum is σ = 144863640. Its totient is φ = 140034736.

The previous prime is 142449173. The next prime is 142449227. The reversal of 142449187 is 781944241.

142449187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 142449187 - 2¹⁹ = 141924899 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142449127) 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, 1207138 + ... + 1207255.

It is an arithmetic number, because the mean of its divisors is an integer number (36215910).

Almost surely, 2^142449187 is an apocalyptic number.

142449187 is a deficient number, since it is larger than the sum of its proper divisors (2414453).

142449187 is an equidigital number, since it uses as much as digits as its factorization.

142449187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414452.

The product of its digits is 64512, while the sum is 40.

The square root of 142449187 is about 11935.2078741847. The cubic root of 142449187 is about 522.2598724142.

The spelling of 142449187 in words is "one hundred forty-two million, four hundred forty-nine thousand, one hundred eighty-seven".