142634521 has 4 divisors (see below), whose sum is σ = 143459172. Its totient is φ = 141809872.

The previous prime is 142634461. The next prime is 142634549. The reversal of 142634521 is 125436241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64577296 + 78057225 = 8036^2 + 8835^2 .

It is a cyclic number.

It is not a de Polignac number, because 142634521 - 2¹¹ = 142632473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142634521.

It is not an unprimeable number, because it can be changed into a prime (142634561) 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, 412066 + ... + 412411.

It is an arithmetic number, because the mean of its divisors is an integer number (35864793).

Almost surely, 2^142634521 is an apocalyptic number.

It is an amenable number.

142634521 is a deficient number, since it is larger than the sum of its proper divisors (824651).

142634521 is an equidigital number, since it uses as much as digits as its factorization.

142634521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824650.

The product of its digits is 5760, while the sum is 28.

The square root of 142634521 is about 11942.9695218568. The cubic root of 142634521 is about 522.4862702527.

The spelling of 142634521 in words is "one hundred forty-two million, six hundred thirty-four thousand, five hundred twenty-one".