1055405 has 12 divisors (see below), whose sum is σ = 1372500. Its totient is φ = 778752.

The previous prime is 1055399. The next prime is 1055407. The reversal of 1055405 is 5045501.

It can be written as a sum of positive squares in 6 ways, for example, as 249001 + 806404 = 499^2 + 898^2 .

It is not a de Polignac number, because 1055405 - 2¹⁰ = 1054381 is a prime.

It is a super-2 number, since 2×1055405² = 2227759428050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221 + ... + 1469.

It is an arithmetic number, because the mean of its divisors is an integer number (114375).

2^1055405 is an apocalyptic number.

It is an amenable number.

1055405 is a deficient number, since it is larger than the sum of its proper divisors (317095).

1055405 is a wasteful number, since it uses less digits than its factorization.

1055405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 1055405 is about 1027.3290612068. The cubic root of 1055405 is about 101.8137379931.

The spelling of 1055405 in words is "one million, fifty-five thousand, four hundred five".