1605006012 has 12 divisors (see below), whose sum is σ = 3745014056. Its totient is φ = 535002000.

The previous prime is 1605005993. The next prime is 1605006031. The reversal of 1605006012 is 2106005061.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1605005993) and next prime (1605006031).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1605006012² = 5152088597112288288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1605006012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66875239 + ... + 66875262.

Almost surely, 2^1605006012 is an apocalyptic number.

1605006012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1605006012 is an abundant number, since it is smaller than the sum of its proper divisors (2140008044).

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

1605006012 is a wasteful number, since it uses less digits than its factorization.

1605006012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133750508 (or 133750506 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1605006012 is about 40062.5262808026. The cubic root of 1605006012 is about 1170.8256309903.

The spelling of 1605006012 in words is "one billion, six hundred five million, six thousand, twelve".