1531873 has 4 divisors (see below), whose sum is σ = 1750720. Its totient is φ = 1313028.

The previous prime is 1531861. The next prime is 1531897. The reversal of 1531873 is 3781351.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1531873 - 2¹⁷ = 1400801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1531813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109413 + ... + 109426.

It is an arithmetic number, because the mean of its divisors is an integer number (437680).

2^1531873 is an apocalyptic number.

It is an amenable number.

1531873 is a deficient number, since it is larger than the sum of its proper divisors (218847).

1531873 is an equidigital number, since it uses as much as digits as its factorization.

1531873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218846.

The product of its digits is 2520, while the sum is 28.

The square root of 1531873 is about 1237.6885714912. The cubic root of 1531873 is about 115.2765367565.

The spelling of 1531873 in words is "one million, five hundred thirty-one thousand, eight hundred seventy-three".