142818401 has 8 divisors (see below), whose sum is σ = 156021600. Its totient is φ = 129651840.

The previous prime is 142818391. The next prime is 142818419. The reversal of 142818401 is 104818241.

It is a happy number.

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 142818401 - 2⁶ = 142818337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142818451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656 + ... + 16913.

It is an arithmetic number, because the mean of its divisors is an integer number (19502700).

Almost surely, 2^142818401 is an apocalyptic number.

142818401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

142818401 is the 5345-th centered decagonal number.

It is an amenable number.

142818401 is a deficient number, since it is larger than the sum of its proper divisors (13203199).

142818401 is a wasteful number, since it uses less digits than its factorization.

142818401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18319.

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 142818401 is about 11950.6652952880. The cubic root of 142818401 is about 522.7106982025.

The spelling of 142818401 in words is "one hundred forty-two million, eight hundred eighteen thousand, four hundred one".