1260040 has 48 divisors (see below), whose sum is σ = 3039300. Its totient is φ = 470016.

The previous prime is 1260031. The next prime is 1260047. The reversal of 1260040 is 400621.

It can be written as a sum of positive squares in 6 ways, for example, as 1012036 + 248004 = 1006^2 + 498^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1260040.

It is not an unprimeable number, because it can be changed into a prime (1260047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11506 + ... + 11614.

2^1260040 is an apocalyptic number.

1260040 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 1260040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1519650).

1260040 is an abundant number, since it is smaller than the sum of its proper divisors (1779260).

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

1260040 is a wasteful number, since it uses less digits than its factorization.

1260040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1260040 is about 1122.5150333069. The cubic root of 1260040 is about 108.0093727577.

Adding to 1260040 its reverse (400621), we get a palindrome (1660661).

The spelling of 1260040 in words is "one million, two hundred sixty thousand, forty".