142112945 has 32 divisors (see below), whose sum is σ = 195864480. Its totient is φ = 98641920.

The previous prime is 142112941. The next prime is 142112947. The reversal of 142112945 is 549211241.

It can be written as a sum of positive squares in 16 ways, for example, as 140944384 + 1168561 = 11872^2 + 1081^2 .

It is not a de Polignac number, because 142112945 - 2² = 142112941 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142112941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186365 + ... + 187125.

It is an arithmetic number, because the mean of its divisors is an integer number (6120765).

Almost surely, 2^142112945 is an apocalyptic number.

It is an amenable number.

142112945 is a deficient number, since it is larger than the sum of its proper divisors (53751535).

142112945 is an equidigital number, since it uses as much as digits as its factorization.

142112945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822 (or 796 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 142112945 is about 11921.1134127648. The cubic root of 142112945 is about 521.8486285693.

The spelling of 142112945 in words is "one hundred forty-two million, one hundred twelve thousand, nine hundred forty-five".