142252749 has 12 divisors (see below), whose sum is σ = 206069500. Its totient is φ = 94561344.

The previous prime is 142252741. The next prime is 142252777. The reversal of 142252749 is 947252241.

It can be written as a sum of positive squares in 2 ways, for example, as 111450249 + 30802500 = 10557^2 + 5550^2 .

It is not a de Polignac number, because 142252749 - 2³ = 142252741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142252741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19504 + ... + 25785.

Almost surely, 2^142252749 is an apocalyptic number.

It is an amenable number.

142252749 is a deficient number, since it is larger than the sum of its proper divisors (63816751).

142252749 is a wasteful number, since it uses less digits than its factorization.

142252749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45644 (or 45641 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 142252749 is about 11926.9756853949. The cubic root of 142252749 is about 522.0196958262.

The spelling of 142252749 in words is "one hundred forty-two million, two hundred fifty-two thousand, seven hundred forty-nine".