1365720 has 64 divisors (see below), whose sum is σ = 4320000. Its totient is φ = 344448.

The previous prime is 1365719. The next prime is 1365731. The reversal of 1365720 is 275631.

It is a super-2 number, since 2×1365720² = 3730382236800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1981 + ... + 2579.

It is an arithmetic number, because the mean of its divisors is an integer number (67500).

2^1365720 is an apocalyptic number.

1365720 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 1365720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2160000).

1365720 is an abundant number, since it is smaller than the sum of its proper divisors (2954280).

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

1365720 is a wasteful number, since it uses less digits than its factorization.

1365720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 1365720 is about 1168.6402354874. The cubic root of 1365720 is about 110.9482755519.

The spelling of 1365720 in words is "one million, three hundred sixty-five thousand, seven hundred twenty".