142112249 has 4 divisors (see below), whose sum is σ = 144442020. Its totient is φ = 139782480.

The previous prime is 142112237. The next prime is 142112261. The reversal of 142112249 is 942211241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 942211241 = 31 ⋅30393911.

It is an interprime number because it is at equal distance from previous prime (142112237) and next prime (142112261).

It can be written as a sum of positive squares in 2 ways, for example, as 73222249 + 68890000 = 8557^2 + 8300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142112249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142112219) 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, 1164794 + ... + 1164915.

It is an arithmetic number, because the mean of its divisors is an integer number (36110505).

Almost surely, 2^142112249 is an apocalyptic number.

It is an amenable number.

142112249 is a deficient number, since it is larger than the sum of its proper divisors (2329771).

142112249 is an equidigital number, since it uses as much as digits as its factorization.

142112249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329770.

The product of its digits is 1152, while the sum is 26.

The square root of 142112249 is about 11921.0842208249. The cubic root of 142112249 is about 521.8477766477.

The spelling of 142112249 in words is "one hundred forty-two million, one hundred twelve thousand, two hundred forty-nine".