1525664 has 48 divisors (see below), whose sum is σ = 3528000. Its totient is φ = 649152.

The previous prime is 1525639. The next prime is 1525669. The reversal of 1525664 is 4665251.

It is not an unprimeable number, because it can be changed into a prime (1525669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10907 + ... + 11045.

It is an arithmetic number, because the mean of its divisors is an integer number (73500).

2^1525664 is an apocalyptic number.

1525664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1525664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1764000).

1525664 is an abundant number, since it is smaller than the sum of its proper divisors (2002336).

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

1525664 is an equidigital number, since it uses as much as digits as its factorization.

1525664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 148 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 1525664 is about 1235.1777200063. The cubic root of 1525664 is about 115.1205792607.

The spelling of 1525664 in words is "one million, five hundred twenty-five thousand, six hundred sixty-four".