142000521 has 16 divisors (see below), whose sum is σ = 205047360. Its totient is φ = 86892480.

The previous prime is 142000519. The next prime is 142000543. The reversal of 142000521 is 125000241.

It is not a de Polignac number, because 142000521 - 2¹ = 142000519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142000521.

It is not an unprimeable number, because it can be changed into a prime (142000511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3190 + ... + 17151.

It is an arithmetic number, because the mean of its divisors is an integer number (12815460).

Almost surely, 2^142000521 is an apocalyptic number.

It is an amenable number.

142000521 is a deficient number, since it is larger than the sum of its proper divisors (63046839).

142000521 is a wasteful number, since it uses less digits than its factorization.

142000521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20536.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 142000521 is about 11916.3971484673. The cubic root of 142000521 is about 521.7109826810.

Adding to 142000521 its reverse (125000241), we get a palindrome (267000762).

The spelling of 142000521 in words is "one hundred forty-two million, five hundred twenty-one", and thus it is an aban number.