1564040 has 32 divisors (see below), whose sum is σ = 3582360. Its totient is φ = 614400.

The previous prime is 1564037. The next prime is 1564049. The reversal of 1564040 is 404651.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1162084 + 401956 = 1078^2 + 634^2 .

It is a super-2 number, since 2×1564040² = 4892442243200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1564049) 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, 2120 + ... + 2760.

2^1564040 is an apocalyptic number.

1564040 is a gapful number since it is divisible by the number (10) 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 1564040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1791180).

1564040 is an abundant number, since it is smaller than the sum of its proper divisors (2018320).

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

1564040 is a wasteful number, since it uses less digits than its factorization.

1564040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1564040 is about 1250.6158482924. The cubic root of 1564040 is about 116.0778312388.

Adding to 1564040 its reverse (404651), we get a palindrome (1968691).

The spelling of 1564040 in words is "one million, five hundred sixty-four thousand, forty".