1587222 has 128 divisors (see below), whose sum is σ = 4838400. Its totient is φ = 373248.

The previous prime is 1587221. The next prime is 1587251. The reversal of 1587222 is 2227851.

1587222 is nontrivially palindromic in base 12.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1587221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 83529 + ... + 83547.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2^1587222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1587222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2419200).

1587222 is an abundant number, since it is smaller than the sum of its proper divisors (3251178).

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

1587222 is a wasteful number, since it uses less digits than its factorization.

1587222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 61 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 1587222 is about 1259.8499910704. The cubic root of 1587222 is about 116.6485178118.

The spelling of 1587222 in words is "one million, five hundred eighty-seven thousand, two hundred twenty-two".