1563140 has 12 divisors (see below), whose sum is σ = 3282636. Its totient is φ = 625248.

The previous prime is 1563137. The next prime is 1563143. The reversal of 1563140 is 413651.

It is an interprime number because it is at equal distance from previous prime (1563137) and next prime (1563143).

It can be written as a sum of positive squares in 2 ways, for example, as 198916 + 1364224 = 446^2 + 1168^2 .

It is a sliding number, since 1563140 = 640 + 1562500 and 1/640 + 1/1562500 = 0.001563140.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 78157 = 1563140 / (1 + 5 + 6 + 3 + 1 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (1563143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39059 + ... + 39098.

It is an arithmetic number, because the mean of its divisors is an integer number (273553).

2^1563140 is an apocalyptic number.

1563140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1563140 is an abundant number, since it is smaller than the sum of its proper divisors (1719496).

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

1563140 is a wasteful number, since it uses less digits than its factorization.

1563140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78166 (or 78164 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1563140 is about 1250.2559737910. The cubic root of 1563140 is about 116.0555619676.

Adding to 1563140 its reverse (413651), we get a palindrome (1976791).

The spelling of 1563140 in words is "one million, five hundred sixty-three thousand, one hundred forty".