1231573 has 4 divisors (see below), whose sum is σ = 1407520. Its totient is φ = 1055628.

The previous prime is 1231553. The next prime is 1231577. The reversal of 1231573 is 3751321.

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 not a de Polignac number, because 1231573 - 2¹³ = 1223381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231577) 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 3 ways as a sum of consecutive naturals, for example, 87963 + ... + 87976.

It is an arithmetic number, because the mean of its divisors is an integer number (351880).

2^1231573 is an apocalyptic number.

It is an amenable number.

1231573 is a deficient number, since it is larger than the sum of its proper divisors (175947).

1231573 is an equidigital number, since it uses as much as digits as its factorization.

1231573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175946.

The product of its digits is 630, while the sum is 22.

The square root of 1231573 is about 1109.7625872231. The cubic root of 1231573 is about 107.1897816892.

Adding to 1231573 its reverse (3751321), we get a palindrome (4982894).

The spelling of 1231573 in words is "one million, two hundred thirty-one thousand, five hundred seventy-three".