1604252159 has 4 divisors (see below), whose sum is σ = 1605765240. Its totient is φ = 1602739080.

The previous prime is 1604252129. The next prime is 1604252197. The reversal of 1604252159 is 9512524061.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9512524061 = 83813 ⋅113497.

It is a cyclic number.

It is not a de Polignac number, because 1604252159 - 2²⁰ = 1603203583 is a prime.

It is a super-2 number, since 2×1604252159² = 5147249979312322562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604252119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754949 + ... + 757070.

It is an arithmetic number, because the mean of its divisors is an integer number (401441310).

Almost surely, 2^1604252159 is an apocalyptic number.

1604252159 is a deficient number, since it is larger than the sum of its proper divisors (1513081).

1604252159 is a wasteful number, since it uses less digits than its factorization.

1604252159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513080.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 1604252159 is about 40053.1167201755. The cubic root of 1604252159 is about 1170.6422944729.

The spelling of 1604252159 in words is "one billion, six hundred four million, two hundred fifty-two thousand, one hundred fifty-nine".