1602505361 has 4 divisors (see below), whose sum is σ = 1608462900. Its totient is φ = 1596547824.

The previous prime is 1602505349. The next prime is 1602505369. The reversal of 1602505361 is 1635052061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1635052061 = 17 ⋅96179533.

It can be written as a sum of positive squares in 2 ways, for example, as 602997136 + 999508225 = 24556^2 + 31615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1602505361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1602505369) 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, 2978366 + ... + 2978903.

It is an arithmetic number, because the mean of its divisors is an integer number (402115725).

Almost surely, 2^1602505361 is an apocalyptic number.

It is an amenable number.

1602505361 is a deficient number, since it is larger than the sum of its proper divisors (5957539).

1602505361 is an equidigital number, since it uses as much as digits as its factorization.

1602505361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5957538.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1602505361 is about 40031.3047626479. The cubic root of 1602505361 is about 1170.2172535907.

The spelling of 1602505361 in words is "one billion, six hundred two million, five hundred five thousand, three hundred sixty-one".