1204531 has 4 divisors (see below), whose sum is σ = 1227312. Its totient is φ = 1181752.

The previous prime is 1204529. The next prime is 1204561. The reversal of 1204531 is 1354021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1204531 - 2¹ = 1204529 is a prime.

It is a super-2 number, since 2×1204531² = 2901789859922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1204561) 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, 11311 + ... + 11416.

It is an arithmetic number, because the mean of its divisors is an integer number (306828).

2^1204531 is an apocalyptic number.

1204531 is a deficient number, since it is larger than the sum of its proper divisors (22781).

1204531 is an equidigital number, since it uses as much as digits as its factorization.

1204531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22780.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1204531 is about 1097.5112755685. The cubic root of 1204531 is about 106.3994363228.

Adding to 1204531 its reverse (1354021), we get a palindrome (2558552).

The spelling of 1204531 in words is "one million, two hundred four thousand, five hundred thirty-one".