142025421 has 4 divisors (see below), whose sum is σ = 189367232. Its totient is φ = 94683612.

The previous prime is 142025417. The next prime is 142025423. The reversal of 142025421 is 124520241.

142025421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 142025421 - 2² = 142025417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142025423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23670901 + ... + 23670906.

It is an arithmetic number, because the mean of its divisors is an integer number (47341808).

Almost surely, 2^142025421 is an apocalyptic number.

It is an amenable number.

142025421 is a deficient number, since it is larger than the sum of its proper divisors (47341811).

142025421 is an equidigital number, since it uses as much as digits as its factorization.

142025421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47341810.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 142025421 is about 11917.4418815449. The cubic root of 142025421 is about 521.7414751613.

Adding to 142025421 its reverse (124520241), we get a palindrome (266545662).

The spelling of 142025421 in words is "one hundred forty-two million, twenty-five thousand, four hundred twenty-one".