1605049245 has 12 divisors (see below), whose sum is σ = 2782085436. Its totient is φ = 856026240.

The previous prime is 1605049223. The next prime is 1605049247. The reversal of 1605049245 is 5429405061.

1605049245 is a `hidden beast` number, since 1 + 60 + 504 + 92 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1034651556 + 570397689 = 32166^2 + 23883^2 .

It is not a de Polignac number, because 1605049245 - 2²⁹ = 1068178333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605049247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17833836 + ... + 17833925.

It is an arithmetic number, because the mean of its divisors is an integer number (231840453).

Almost surely, 2^1605049245 is an apocalyptic number.

1605049245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1605049245 is a deficient number, since it is larger than the sum of its proper divisors (1177036191).

1605049245 is a wasteful number, since it uses less digits than its factorization.

1605049245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35667772 (or 35667769 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1605049245 is about 40063.0658462380. The cubic root of 1605049245 is about 1170.8361434846.

It can be divided in two parts, 160 and 5049245, that added together give a palindrome (5049405).

The spelling of 1605049245 in words is "one billion, six hundred five million, forty-nine thousand, two hundred forty-five".