387522 has 12 divisors (see below), whose sum is σ = 839670. Its totient is φ = 129168.

The previous prime is 387509. The next prime is 387529. The reversal of 387522 is 225783.

It can be written as a sum of positive squares in only one way, i.e., 370881 + 16641 = 609^2 + 129^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (387529) by changing a digit.

387522 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10747 + ... + 10782.

2³⁸⁷⁵²² is an apocalyptic number.

387522 is an abundant number, since it is smaller than the sum of its proper divisors (452148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

387522 is a wasteful number, since it uses less digits than its factorization.

387522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21537 (or 21534 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 387522 is about 622.5126504739. The cubic root of 387522 is about 72.9063664725.

It can be divided in two parts, 387 and 522, that added together give a palindrome (909).

The spelling of 387522 in words is "three hundred eighty-seven thousand, five hundred twenty-two".