1509723 has 6 divisors (see below), whose sum is σ = 2180724. Its totient is φ = 1006476.

The previous prime is 1509701. The next prime is 1509727. The reversal of 1509723 is 3279051.

It is not a de Polignac number, because 1509723 - 2⁶ = 1509659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1509727) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 83865 + ... + 83882.

It is an arithmetic number, because the mean of its divisors is an integer number (363454).

2^1509723 is an apocalyptic number.

1509723 is a deficient number, since it is larger than the sum of its proper divisors (671001).

1509723 is a wasteful number, since it uses less digits than its factorization.

1509723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167753 (or 167750 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 1509723 is about 1228.7078578735. The cubic root of 1509723 is about 114.7182263546.

It can be divided in two parts, 150972 and 3, that added together give a triangular number (150975 = T₅₄₉).

The spelling of 1509723 in words is "one million, five hundred nine thousand, seven hundred twenty-three".