1604231 has 2 divisors, whose sum is σ = 1604232. Its totient is φ = 1604230.

The previous prime is 1604191. The next prime is 1604237. The reversal of 1604231 is 1324061.

It is a strong prime.

It is an emirp because it is prime and its reverse (1324061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1604231 - 2⁶ = 1604167 is a prime.

It is a super-2 number, since 2×1604231² = 5147114202722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604237) 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 as a sum of consecutive naturals, namely, 802115 + 802116.

It is an arithmetic number, because the mean of its divisors is an integer number (802116).

2^1604231 is an apocalyptic number.

1604231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604231 is an equidigital number, since it uses as much as digits as its factorization.

1604231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1604231 is about 1266.5824094784. The cubic root of 1604231 is about 117.0637147790.

Adding to 1604231 its reverse (1324061), we get a palindrome (2928292).

The spelling of 1604231 in words is "one million, six hundred four thousand, two hundred thirty-one".