142440001 has 8 divisors (see below), whose sum is σ = 156816000. Its totient is φ = 128301840.

The previous prime is 142439993. The next prime is 142440007. The reversal of 142440001 is 100044241.

142440001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 142440001 - 2³ = 142439993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142440007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58201 + ... + 60598.

It is an arithmetic number, because the mean of its divisors is an integer number (19602000).

Almost surely, 2^142440001 is an apocalyptic number.

142440001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142440001 is a deficient number, since it is larger than the sum of its proper divisors (14375999).

142440001 is a wasteful number, since it uses less digits than its factorization.

142440001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118919.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 142440001 is about 11934.8230401628. The cubic root of 142440001 is about 522.2486459963.

Adding to 142440001 its reverse (100044241), we get a palindrome (242484242).

The spelling of 142440001 in words is "one hundred forty-two million, four hundred forty thousand, one".