165420012 has 12 divisors (see below), whose sum is σ = 385980056. Its totient is φ = 55140000.

The previous prime is 165419993. The next prime is 165420037. The reversal of 165420012 is 210024561.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6892489 + ... + 6892512.

Almost surely, 2^165420012 is an apocalyptic number.

165420012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165420012 is an abundant number, since it is smaller than the sum of its proper divisors (220560044).

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

165420012 is a wasteful number, since it uses less digits than its factorization.

165420012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13785008 (or 13785006 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 165420012 is about 12861.5711326416. The cubic root of 165420012 is about 548.9456517346.

Adding to 165420012 its reverse (210024561), we get a palindrome (375444573).

The spelling of 165420012 in words is "one hundred sixty-five million, four hundred twenty thousand, twelve".