12155065 has 16 divisors (see below), whose sum is σ = 16094736. Its totient is φ = 8755200.

The previous prime is 12155057. The next prime is 12155081. The reversal of 12155065 is 56055121.

It can be written as a sum of positive squares in 8 ways, for example, as 4247721 + 7907344 = 2061^2 + 2812^2 .

It is not a de Polignac number, because 12155065 - 2³ = 12155057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385 + ... + 4945.

It is an arithmetic number, because the mean of its divisors is an integer number (1005921).

Almost surely, 2^12155065 is an apocalyptic number.

It is an amenable number.

12155065 is a deficient number, since it is larger than the sum of its proper divisors (3939671).

12155065 is a wasteful number, since it uses less digits than its factorization.

12155065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4620.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 12155065 is about 3486.4114788705. The cubic root of 12155065 is about 229.9247706074.

The spelling of 12155065 in words is "twelve million, one hundred fifty-five thousand, sixty-five".