1304531 has 2 divisors, whose sum is σ = 1304532. Its totient is φ = 1304530.

The previous prime is 1304519. The next prime is 1304539. The reversal of 1304531 is 1354031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1304531 - 2¹⁰ = 1303507 is a prime.

It is a super-2 number, since 2×1304531² = 3403602259922, which contains 22 as substring.

It is a Chen prime.

It is equal to p₁₀₀₃₄₉ and since 1304531 and 100349 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1304539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652265 + 652266.

It is an arithmetic number, because the mean of its divisors is an integer number (652266).

2^1304531 is an apocalyptic number.

1304531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304531 is an equidigital number, since it uses as much as digits as its factorization.

1304531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1304531 is about 1142.1606717095. The cubic root of 1304531 is about 109.2659387435.

Adding to 1304531 its reverse (1354031), we get a palindrome (2658562).

The spelling of 1304531 in words is "one million, three hundred four thousand, five hundred thirty-one".