1332720 has 80 divisors (see below), whose sum is σ = 4597920. Its totient is φ = 354816.

The previous prime is 1332719. The next prime is 1332733. The reversal of 1332720 is 272331.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1332720² = 3552285196800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 6 and base 12.

It is a junction number, because it is equal to n+sod(n) for n = 1332693 and 1332702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1852 + ... + 2468.

It is an arithmetic number, because the mean of its divisors is an integer number (57474).

2^1332720 is an apocalyptic number.

1332720 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 1332720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2298960).

1332720 is an abundant number, since it is smaller than the sum of its proper divisors (3265200).

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

1332720 is a wasteful number, since it uses less digits than its factorization.

1332720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 1332720 is about 1154.4349267066. The cubic root of 1332720 is about 110.0473625244.

The spelling of 1332720 in words is "one million, three hundred thirty-two thousand, seven hundred twenty".