1300240 has 20 divisors (see below), whose sum is σ = 3023244. Its totient is φ = 520064.

The previous prime is 1300237. The next prime is 1300253. The reversal of 1300240 is 420031.

It can be written as a sum of positive squares in 2 ways, for example, as 685584 + 614656 = 828^2 + 784^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8047 + ... + 8206.

2^1300240 is an apocalyptic number.

1300240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1300240 is an abundant number, since it is smaller than the sum of its proper divisors (1723004).

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

1300240 is a wasteful number, since it uses less digits than its factorization.

1300240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16266 (or 16260 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 1300240 is about 1140.2806672044. The cubic root of 1300240 is about 109.1460041567.

Adding to 1300240 its reverse (420031), we get a palindrome (1720271).

It can be divided in two parts, 1300 and 240, that added together give a triangular number (1540 = T₅₅).

The spelling of 1300240 in words is "one million, three hundred thousand, two hundred forty".