1531923 has 8 divisors (see below), whose sum is σ = 2048448. Its totient is φ = 1018344.

The previous prime is 1531909. The next prime is 1531987. The reversal of 1531923 is 3291351.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1531923 - 2²⁰ = 483347 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1531893 and 1531902.

It is not an unprimeable number, because it can be changed into a prime (1535923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1236 + ... + 2142.

It is an arithmetic number, because the mean of its divisors is an integer number (256056).

2^1531923 is an apocalyptic number.

1531923 is a deficient number, since it is larger than the sum of its proper divisors (516525).

1531923 is an equidigital number, since it uses as much as digits as its factorization.

1531923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473.

The product of its digits is 810, while the sum is 24.

The square root of 1531923 is about 1237.7087702687. The cubic root of 1531923 is about 115.2777909432.

The spelling of 1531923 in words is "one million, five hundred thirty-one thousand, nine hundred twenty-three".