142521201 has 24 divisors (see below), whose sum is σ = 215639424. Its totient is φ = 94057200.

The previous prime is 142521191. The next prime is 142521241. The reversal of 142521201 is 102125241.

142521201 is a `hidden beast` number, since 142 + 521 + 2 + 0 + 1 = 666.

It is not a de Polignac number, because 142521201 - 2¹⁰ = 142520177 is a prime.

It is a Curzon 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 23 ways as a sum of consecutive naturals, for example, 21640 + ... + 27446.

It is an arithmetic number, because the mean of its divisors is an integer number (8984976).

Almost surely, 2^142521201 is an apocalyptic number.

It is an amenable number.

142521201 is a deficient number, since it is larger than the sum of its proper divisors (73118223).

142521201 is an equidigital number, since it uses as much as digits as its factorization.

142521201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5923 (or 5911 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 142521201 is about 11938.2243654574. The cubic root of 142521201 is about 522.3478656306.

Adding to 142521201 its reverse (102125241), we get a palindrome (244646442).

The spelling of 142521201 in words is "one hundred forty-two million, five hundred twenty-one thousand, two hundred one".