1604235245 has 4 divisors (see below), whose sum is σ = 1925082300. Its totient is φ = 1283388192.

The previous prime is 1604235239. The next prime is 1604235299. The reversal of 1604235245 is 5425324061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5425324061 = 43 ⋅126170327.

It can be written as a sum of positive squares in 2 ways, for example, as 179399236 + 1424836009 = 13394^2 + 37747^2 .

It is a cyclic number.

It is not a de Polignac number, because 1604235245 - 2²² = 1600040941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160423520 + ... + 160423529.

It is an arithmetic number, because the mean of its divisors is an integer number (481270575).

Almost surely, 2^1604235245 is an apocalyptic number.

It is an amenable number.

1604235245 is a deficient number, since it is larger than the sum of its proper divisors (320847055).

1604235245 is an equidigital number, since it uses as much as digits as its factorization.

1604235245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320847054.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 1604235245 is about 40052.9055750017. The cubic root of 1604235245 is about 1170.6381803414.

The spelling of 1604235245 in words is "one billion, six hundred four million, two hundred thirty-five thousand, two hundred forty-five".