142258521 has 8 divisors (see below), whose sum is σ = 190577824. Its totient is φ = 94389120.

The previous prime is 142258489. The next prime is 142258537. The reversal of 142258521 is 125852241.

142258521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 142258521 - 2⁵ = 142258489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142258591) 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, 111736 + ... + 113001.

It is an arithmetic number, because the mean of its divisors is an integer number (23822228).

Almost surely, 2^142258521 is an apocalyptic number.

It is an amenable number.

142258521 is a deficient number, since it is larger than the sum of its proper divisors (48319303).

142258521 is a wasteful number, since it uses less digits than its factorization.

142258521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224951.

The product of its digits is 6400, while the sum is 30.

The square root of 142258521 is about 11927.2176554300. The cubic root of 142258521 is about 522.0267561629.

The spelling of 142258521 in words is "one hundred forty-two million, two hundred fifty-eight thousand, five hundred twenty-one".