1015664 has 40 divisors (see below), whose sum is σ = 2239440. Its totient is φ = 442368.

The previous prime is 1015661. The next prime is 1015691. The reversal of 1015664 is 4665101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1015661) 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, 3824 + ... + 4080.

It is an arithmetic number, because the mean of its divisors is an integer number (55986).

2^1015664 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 1015664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119720).

1015664 is an abundant number, since it is smaller than the sum of its proper divisors (1223776).

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

1015664 is a wasteful number, since it uses less digits than its factorization.

1015664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1015664 is about 1007.8015677702. The cubic root of 1015664 is about 100.5194305805.

The spelling of 1015664 in words is "one million, fifteen thousand, six hundred sixty-four".