3123855 has 48 divisors (see below), whose sum is σ = 6349824. Its totient is φ = 1391040.

The previous prime is 3123853. The next prime is 3123859. The reversal of 3123855 is 5583213.

It is not a de Polignac number, because 3123855 - 2¹ = 3123853 is a prime.

It is a super-2 number, since 2×3123855² = 19516940122050, which contains 22 as substring.

3123855 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123853) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14700 + ... + 14910.

It is an arithmetic number, because the mean of its divisors is an integer number (132288).

Almost surely, 2^3123855 is an apocalyptic number.

3123855 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3123855 is an abundant number, since it is smaller than the sum of its proper divisors (3225969).

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

3123855 is a wasteful number, since it uses less digits than its factorization.

3123855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 273 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 3123855 is about 1767.4430683900. The cubic root of 3123855 is about 146.1830287277.

The spelling of 3123855 in words is "three million, one hundred twenty-three thousand, eight hundred fifty-five".