1522664 has 40 divisors (see below), whose sum is σ = 3382050. Its totient is φ = 638880.

The previous prime is 1522663. The next prime is 1522681. The reversal of 1522664 is 4662251.

1522664 = T₃₆₁ + T₃₆₂ + ... + T₃₈₂.

It can be written as a sum of positive squares in only one way, i.e., 1464100 + 58564 = 1210^2 + 242^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1522663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 117122 + ... + 117134.

2^1522664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1522664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1691025).

1522664 is an abundant number, since it is smaller than the sum of its proper divisors (1859386).

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

1522664 is an equidigital number, since it uses as much as digits as its factorization.

1522664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 26 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 1522664 is about 1233.9627222895. The cubic root of 1522664 is about 115.0450736986.

Multiplying 1522664 by its sum of digits (26), we get a square (39589264 = 6292²).

1522664 divided by its sum of digits (26) gives a square (58564 = 242²).

The spelling of 1522664 in words is "one million, five hundred twenty-two thousand, six hundred sixty-four".