3122805 has 16 divisors (see below), whose sum is σ = 5710464. Its totient is φ = 1427520.

The previous prime is 3122797. The next prime is 3122809. The reversal of 3122805 is 5082213.

It is not a de Polignac number, because 3122805 - 2³ = 3122797 is a prime.

It is a super-2 number, since 2×3122805² = 19503822136050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

3122805 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3122809) 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, 14766 + ... + 14975.

It is an arithmetic number, because the mean of its divisors is an integer number (356904).

Almost surely, 2^3122805 is an apocalyptic number.

3122805 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3122805 is a deficient number, since it is larger than the sum of its proper divisors (2587659).

3122805 is a wasteful number, since it uses less digits than its factorization.

3122805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29756.

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

The square root of 3122805 is about 1767.1460041547. The cubic root of 3122805 is about 146.1666483920.

The spelling of 3122805 in words is "three million, one hundred twenty-two thousand, eight hundred five".