142123145 has 8 divisors (see below), whose sum is σ = 180580104. Its totient is φ = 107010304.

The previous prime is 142123109. The next prime is 142123199. The reversal of 142123145 is 541321241.

It can be written as a sum of positive squares in 4 ways, for example, as 23116864 + 119006281 = 4808^2 + 10909^2 .

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 142123145 - 2⁶ = 142123081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142123145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835934 + ... + 836103.

It is an arithmetic number, because the mean of its divisors is an integer number (22572513).

Almost surely, 2^142123145 is an apocalyptic number.

It is an amenable number.

142123145 is a deficient number, since it is larger than the sum of its proper divisors (38456959).

142123145 is a wasteful number, since it uses less digits than its factorization.

142123145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672059.

The product of its digits is 960, while the sum is 23.

The square root of 142123145 is about 11921.5412174769. The cubic root of 142123145 is about 521.8611133073.

Adding to 142123145 its reverse (541321241), we get a palindrome (683444386).

The spelling of 142123145 in words is "one hundred forty-two million, one hundred twenty-three thousand, one hundred forty-five".