1051605 has 12 divisors (see below), whose sum is σ = 1822860. Its totient is φ = 560832.

The previous prime is 1051601. The next prime is 1051607. The reversal of 1051605 is 5061501.

1051605 is a `hidden beast` number, since 10 + 51 + 605 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 815409 = 486^2 + 903^2 .

It is not a de Polignac number, because 1051605 - 2² = 1051601 is a prime.

It is a super-2 number, since 2×1051605² = 2211746152050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051601) 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, 11640 + ... + 11729.

It is an arithmetic number, because the mean of its divisors is an integer number (151905).

2^1051605 is an apocalyptic number.

1051605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1051605 is a deficient number, since it is larger than the sum of its proper divisors (771255).

1051605 is a wasteful number, since it uses less digits than its factorization.

1051605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23380 (or 23377 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 1051605 is about 1025.4779373541. The cubic root of 1051605 is about 101.6913971311.

It can be divided in two parts, 10 and 51605, that added together give a palindrome (51615).

The spelling of 1051605 in words is "one million, fifty-one thousand, six hundred five".