142487189 has 8 divisors (see below), whose sum is σ = 154109592. Its totient is φ = 130959360.

The previous prime is 142487159. The next prime is 142487197. The reversal of 142487189 is 981784241.

It can be written as a sum of positive squares in 4 ways, for example, as 3648100 + 138839089 = 1910^2 + 11783^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142487189 - 2²⁰ = 141438613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142487159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20492 + ... + 26549.

It is an arithmetic number, because the mean of its divisors is an integer number (19263699).

Almost surely, 2^142487189 is an apocalyptic number.

It is an amenable number.

142487189 is a deficient number, since it is larger than the sum of its proper divisors (11622403).

142487189 is a wasteful number, since it uses less digits than its factorization.

142487189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47287.

The product of its digits is 129024, while the sum is 44.

The square root of 142487189 is about 11936.7997805107. The cubic root of 142487189 is about 522.3063103885.

The spelling of 142487189 in words is "one hundred forty-two million, four hundred eighty-seven thousand, one hundred eighty-nine".