142220401 has 4 divisors (see below), whose sum is σ = 142292592. Its totient is φ = 142148212.

The previous prime is 142220399. The next prime is 142220413. The reversal of 142220401 is 104022241.

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 not a de Polignac number, because 142220401 - 2¹ = 142220399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142220101) 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, 33055 + ... + 37108.

It is an arithmetic number, because the mean of its divisors is an integer number (35573148).

Almost surely, 2^142220401 is an apocalyptic number.

It is an amenable number.

142220401 is a deficient number, since it is larger than the sum of its proper divisors (72191).

142220401 is an equidigital number, since it uses as much as digits as its factorization.

142220401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72190.

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

The square root of 142220401 is about 11925.6195226915. The cubic root of 142220401 is about 521.9801240701.

Adding to 142220401 its reverse (104022241), we get a palindrome (246242642).

The spelling of 142220401 in words is "one hundred forty-two million, two hundred twenty thousand, four hundred one".