140142001 has 4 divisors (see below), whose sum is σ = 142115904. Its totient is φ = 138168100.

The previous prime is 140141993. The next prime is 140142019. The reversal of 140142001 is 100241041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 100241041 = 43 ⋅2331187.

It is a cyclic number.

It is not a de Polignac number, because 140142001 - 2³ = 140141993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140142061) 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 3 ways as a sum of consecutive naturals, for example, 986845 + ... + 986986.

It is an arithmetic number, because the mean of its divisors is an integer number (35528976).

Almost surely, 2^140142001 is an apocalyptic number.

It is an amenable number.

140142001 is a deficient number, since it is larger than the sum of its proper divisors (1973903).

140142001 is an equidigital number, since it uses as much as digits as its factorization.

140142001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973902.

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

The square root of 140142001 is about 11838.1586828358. The cubic root of 140142001 is about 519.4249078524.

Adding to 140142001 its reverse (100241041), we get a palindrome (240383042).

The spelling of 140142001 in words is "one hundred forty million, one hundred forty-two thousand, one".