142549288249 has 3 divisors (see below), whose sum is σ = 142549665807. Its totient is φ = 142548910692.

The previous prime is 142549288169. The next prime is 142549288253. The reversal of 142549288249 is 942882945241.

It is a happy number.

The square root of 142549288249 is 377557.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 942882945241 = 7867 ⋅119852923.

It can be written as a sum of positive squares in only one way, i.e., 5154522025 + 137394766224 = 71795^2 + 370668^2 .

It is not a de Polignac number, because 142549288249 - 2²⁵ = 142515733817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142549288193 and 142549288202.

It is not an unprimeable number, because it can be changed into a prime (142549288549) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 188779 + ... + 566335.

It is an arithmetic number, because the mean of its divisors is an integer number (47516555269).

Almost surely, 2^142549288249 is an apocalyptic number.

142549288249 is the 377557-th square number.

142549288249 is the 188779-th centered octagonal number.

It is an amenable number.

142549288249 is a deficient number, since it is larger than the sum of its proper divisors (377558).

142549288249 is an frugal number, since it uses more digits than its factorization.

142549288249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755114 (or 377557 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 58.

The spelling of 142549288249 in words is "one hundred forty-two billion, five hundred forty-nine million, two hundred eighty-eight thousand, two hundred forty-nine".