1605542341 has 8 divisors (see below), whose sum is σ = 1788668280. Its totient is φ = 1430933952.

The previous prime is 1605542321. The next prime is 1605542357. The reversal of 1605542341 is 1432455061.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 455993316 + 1149549025 = 21354^2 + 33905^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1605542341 - 2¹³ = 1605534149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605542321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2128990 + ... + 2129743.

It is an arithmetic number, because the mean of its divisors is an integer number (223583535).

Almost surely, 2^1605542341 is an apocalyptic number.

It is an amenable number.

1605542341 is a deficient number, since it is larger than the sum of its proper divisors (183125939).

1605542341 is a wasteful number, since it uses less digits than its factorization.

1605542341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4258775.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1605542341 is about 40069.2193709835. The cubic root of 1605542341 is about 1170.9560308773.

The spelling of 1605542341 in words is "one billion, six hundred five million, five hundred forty-two thousand, three hundred forty-one".