142140001 has 4 divisors (see below), whose sum is σ = 142231600. Its totient is φ = 142048404.

The previous prime is 142139981. The next prime is 142140029. The reversal of 142140001 is 100041241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142140001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142140041) 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, 43431 + ... + 46588.

It is an arithmetic number, because the mean of its divisors is an integer number (35557900).

Almost surely, 2^142140001 is an apocalyptic number.

It is an amenable number.

142140001 is a deficient number, since it is larger than the sum of its proper divisors (91599).

142140001 is an equidigital number, since it uses as much as digits as its factorization.

142140001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91598.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 142140001 is about 11922.2481520894. The cubic root of 142140001 is about 521.8817436398.

Adding to 142140001 its reverse (100041241), we get a palindrome (242181242).

The spelling of 142140001 in words is "one hundred forty-two million, one hundred forty thousand, one".