1605356142 has 64 divisors (see below), whose sum is σ = 3602565120. Its totient is φ = 473558400.

The previous prime is 1605356131. The next prime is 1605356143. The reversal of 1605356142 is 2416535061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605356143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260517 + ... + 266607.

It is an arithmetic number, because the mean of its divisors is an integer number (56290080).

Almost surely, 2^1605356142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1605356142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1801282560).

1605356142 is an abundant number, since it is smaller than the sum of its proper divisors (1997208978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1605356142 is a wasteful number, since it uses less digits than its factorization.

1605356142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6249.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 1605356142 is about 40066.8958368377. The cubic root of 1605356142 is about 1170.9107628359.

The spelling of 1605356142 in words is "one billion, six hundred five million, three hundred fifty-six thousand, one hundred forty-two".