3145665 has 16 divisors (see below), whose sum is σ = 5151168. Its totient is φ = 1638336.

The previous prime is 3145661. The next prime is 3145669. The reversal of 3145665 is 5665413.

It is an interprime number because it is at equal distance from previous prime (3145661) and next prime (3145669).

It is not a de Polignac number, because 3145665 - 2² = 3145661 is a prime.

It is an Ulam number.

It is a Curzon number.

3145665 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3145661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1794 + ... + 3083.

It is an arithmetic number, because the mean of its divisors is an integer number (321948).

Almost surely, 2^3145665 is an apocalyptic number.

It is an amenable number.

3145665 is a deficient number, since it is larger than the sum of its proper divisors (2005503).

3145665 is a wasteful number, since it uses less digits than its factorization.

3145665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4928.

The product of its digits is 10800, while the sum is 30.

The square root of 3145665 is about 1773.6022665750. The cubic root of 3145665 is about 146.5224448909.

The spelling of 3145665 in words is "three million, one hundred forty-five thousand, six hundred sixty-five".