1505720 has 16 divisors (see below), whose sum is σ = 3387960. Its totient is φ = 602272.

The previous prime is 1505711. The next prime is 1505723. The reversal of 1505720 is 275051.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1505692 and 1505701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1505723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18782 + ... + 18861.

2^1505720 is an apocalyptic number.

1505720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1505720 is an abundant number, since it is smaller than the sum of its proper divisors (1882240).

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

1505720 is a wasteful number, since it uses less digits than its factorization.

1505720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37654 (or 37650 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 1505720 is about 1227.0778296424. The cubic root of 1505720 is about 114.6167455913.

The spelling of 1505720 in words is "one million, five hundred five thousand, seven hundred twenty".