1364240 has 20 divisors (see below), whose sum is σ = 3172044. Its totient is φ = 545664.

The previous prime is 1364239. The next prime is 1364243. The reversal of 1364240 is 424631.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 495616 + 868624 = 704^2 + 932^2 .

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

It is a super-2 number, since 2×1364240² = 3722301555200, 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 (1364243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8447 + ... + 8606.

2^1364240 is an apocalyptic number.

1364240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1364240 is an abundant number, since it is smaller than the sum of its proper divisors (1807804).

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

1364240 is a wasteful number, since it uses less digits than its factorization.

1364240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17066 (or 17060 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1364240 is about 1168.0068492950. The cubic root of 1364240 is about 110.9081836838.

Adding to 1364240 its reverse (424631), we get a palindrome (1788871).

The spelling of 1364240 in words is "one million, three hundred sixty-four thousand, two hundred forty".