2755405 has 8 divisors (see below), whose sum is σ = 3387384. Its totient is φ = 2150400.

The previous prime is 2755393. The next prime is 2755409. The reversal of 2755405 is 5045572.

It can be written as a sum of positive squares in 4 ways, for example, as 72361 + 2683044 = 269^2 + 1638^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2755405 - 2⁹ = 2754893 is a prime.

It is a super-3 number, since 3×2755405³ = 62759226333324165375, which contains 333 as substring.

It is a Duffinian number.

2755405 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2755409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6516 + ... + 6925.

It is an arithmetic number, because the mean of its divisors is an integer number (423423).

2^2755405 is an apocalyptic number.

It is an amenable number.

2755405 is a deficient number, since it is larger than the sum of its proper divisors (631979).

2755405 is a wasteful number, since it uses less digits than its factorization.

2755405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13487.

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 2755405 is about 1659.9412640211. The cubic root of 2755405 is about 140.1936944789.

It can be divided in two parts, 2755 and 405, that added together give a triangular number (3160 = T₇₉).

The spelling of 2755405 in words is "two million, seven hundred fifty-five thousand, four hundred five".