142120045 has 8 divisors (see below), whose sum is σ = 170976024. Its totient is φ = 113408064.

The previous prime is 142120037. The next prime is 142120049. The reversal of 142120045 is 540021241.

It can be written as a sum of positive squares in 4 ways, for example, as 57957769 + 84162276 = 7613^2 + 9174^2 .

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 142120045 - 2³ = 142120037 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 (142120049) 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 7 ways as a sum of consecutive naturals, for example, 33814 + ... + 37783.

It is an arithmetic number, because the mean of its divisors is an integer number (21372003).

Almost surely, 2^142120045 is an apocalyptic number.

It is an amenable number.

142120045 is a deficient number, since it is larger than the sum of its proper divisors (28855979).

142120045 is an equidigital number, since it uses as much as digits as its factorization.

142120045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71999.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 142120045 is about 11921.4112000216. The cubic root of 142120045 is about 521.8573189893.

Adding to 142120045 its reverse (540021241), we get a palindrome (682141286).

The spelling of 142120045 in words is "one hundred forty-two million, one hundred twenty thousand, forty-five".