4155405 has 16 divisors (see below), whose sum is σ = 6699840. Its totient is φ = 2199168.

The previous prime is 4155401. The next prime is 4155409. The reversal of 4155405 is 5045514.

It is an interprime number because it is at equal distance from previous prime (4155401) and next prime (4155409).

It is not a de Polignac number, because 4155405 - 2² = 4155401 is a prime.

4155405 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4155401) 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, 1089 + ... + 3081.

It is an arithmetic number, because the mean of its divisors is an integer number (418740).

Almost surely, 2^4155405 is an apocalyptic number.

It is an amenable number.

4155405 is a deficient number, since it is larger than the sum of its proper divisors (2544435).

4155405 is a wasteful number, since it uses less digits than its factorization.

4155405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 4155405 is about 2038.4810521562. The cubic root of 4155405 is about 160.7697930313.

It can be divided in two parts, 4155 and 405, that added together give a triangular number (4560 = T₉₅).

The spelling of 4155405 in words is "four million, one hundred fifty-five thousand, four hundred five".