142521211 has 8 divisors (see below), whose sum is σ = 165176064. Its totient is φ = 120440040.

The previous prime is 142521191. The next prime is 142521241. The reversal of 142521211 is 112125241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142521211 - 2⁷ = 142521083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142521241) 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, 142885 + ... + 143878.

It is an arithmetic number, because the mean of its divisors is an integer number (20647008).

Almost surely, 2^142521211 is an apocalyptic number.

142521211 is a deficient number, since it is larger than the sum of its proper divisors (22654853).

142521211 is an equidigital number, since it uses as much as digits as its factorization.

142521211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286841.

The product of its digits is 160, while the sum is 19.

The square root of 142521211 is about 11938.2247842801. The cubic root of 142521211 is about 522.3478778474.

Adding to 142521211 its reverse (112125241), we get a palindrome (254646452).

The spelling of 142521211 in words is "one hundred forty-two million, five hundred twenty-one thousand, two hundred eleven".