1604001026 has 8 divisors (see below), whose sum is σ = 2406611964. Its totient is φ = 801797040.

The previous prime is 1604000953. The next prime is 1604001037. The reversal of 1604001026 is 6201004061.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1210970401 + 393030625 = 34799^2 + 19825^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1604000989 and 1604001007.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91685 + ... + 107768.

Almost surely, 2^1604001026 is an apocalyptic number.

1604001026 is a deficient number, since it is larger than the sum of its proper divisors (802610938).

1604001026 is a wasteful number, since it uses less digits than its factorization.

1604001026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203476.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1604001026 is about 40049.9815979983. The cubic root of 1604001026 is about 1170.5812063513.

Adding to 1604001026 its reverse (6201004061), we get a palindrome (7805005087).

The spelling of 1604001026 in words is "one billion, six hundred four million, one thousand, twenty-six".