142939145 has 16 divisors (see below), whose sum is σ = 185049360. Its totient is φ = 105590784.

The previous prime is 142939129. The next prime is 142939151. The reversal of 142939145 is 541939241.

It can be written as a sum of positive squares in 8 ways, for example, as 29474041 + 113465104 = 5429^2 + 10652^2 .

It is a cyclic number.

It is not a de Polignac number, because 142939145 - 2⁴ = 142939129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142939099 and 142939108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11360 + ... + 20369.

It is an arithmetic number, because the mean of its divisors is an integer number (11565585).

Almost surely, 2^142939145 is an apocalyptic number.

It is an amenable number.

142939145 is a deficient number, since it is larger than the sum of its proper divisors (42110215).

142939145 is a wasteful number, since it uses less digits than its factorization.

142939145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31804.

The product of its digits is 38880, while the sum is 38.

The square root of 142939145 is about 11955.7159969615. The cubic root of 142939145 is about 522.8579630790.

The spelling of 142939145 in words is "one hundred forty-two million, nine hundred thirty-nine thousand, one hundred forty-five".