1604725213 has 32 divisors (see below), whose sum is σ = 2028029696. Its totient is φ = 1235824128.

The previous prime is 1604725207. The next prime is 1604725259. The reversal of 1604725213 is 3125274061.

It is not a de Polignac number, because 1604725213 - 2⁹ = 1604724701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604725813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1552945 + ... + 1553977.

It is an arithmetic number, because the mean of its divisors is an integer number (63375928).

Almost surely, 2^1604725213 is an apocalyptic number.

1604725213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1604725213 is a deficient number, since it is larger than the sum of its proper divisors (423304483).

1604725213 is a wasteful number, since it uses less digits than its factorization.

1604725213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1604725213 is about 40059.0216181074. The cubic root of 1604725213 is about 1170.7573475823.

Adding to 1604725213 its reverse (3125274061), we get a palindrome (4729999274).

The spelling of 1604725213 in words is "one billion, six hundred four million, seven hundred twenty-five thousand, two hundred thirteen".