142638001 has 8 divisors (see below), whose sum is σ = 156413664. Its totient is φ = 128997120.

The previous prime is 142637993. The next prime is 142638011. The reversal of 142638001 is 100836241.

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 142638001 - 2³ = 142637993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142638011) 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, 31471 + ... + 35716.

It is an arithmetic number, because the mean of its divisors is an integer number (19551708).

Almost surely, 2^142638001 is an apocalyptic number.

142638001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142638001 is a deficient number, since it is larger than the sum of its proper divisors (13775663).

142638001 is a wasteful number, since it uses less digits than its factorization.

142638001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67391.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 142638001 is about 11943.1152133771. The cubic root of 142638001 is about 522.4905194284.

The spelling of 142638001 in words is "one hundred forty-two million, six hundred thirty-eight thousand, one".