1604500123 has 4 divisors (see below), whose sum is σ = 1604594368. Its totient is φ = 1604405880.

The previous prime is 1604500097. The next prime is 1604500133. The reversal of 1604500123 is 3210054061.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3210054061 = 31 ⋅103550131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1604500123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1604500094 and 1604500103.

It is not an unprimeable number, because it can be changed into a prime (1604500133) 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 3 ways as a sum of consecutive naturals, for example, 13668 + ... + 58273.

It is an arithmetic number, because the mean of its divisors is an integer number (401148592).

Almost surely, 2^1604500123 is an apocalyptic number.

1604500123 is a deficient number, since it is larger than the sum of its proper divisors (94245).

1604500123 is an equidigital number, since it uses as much as digits as its factorization.

1604500123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94244.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1604500123 is about 40056.2120400819. The cubic root of 1604500123 is about 1170.7026054803.

Adding to 1604500123 its reverse (3210054061), we get a palindrome (4814554184).

The spelling of 1604500123 in words is "one billion, six hundred four million, five hundred thousand, one hundred twenty-three".