1055405169 has 135 divisors (see below), whose sum is σ = 2045718753. Its totient is φ = 523950336.

The previous prime is 1055405167. The next prime is 1055405171. The reversal of 1055405169 is 9615045501.

The square root of 1055405169 is 32487.

It is a perfect power (a square), and thus also a powerful number.

1055405169 is a `hidden beast` number, since 1 + 0 + 5 + 540 + 51 + 69 = 666.

It is an interprime number because it is at equal distance from previous prime (1055405167) and next prime (1055405171).

It can be written as a sum of positive squares in 4 ways, for example, as 9529569 + 1045875600 = 3087^2 + 32340^2 .

It is not a de Polignac number, because 1055405169 - 2¹ = 1055405167 is a prime.

It is a super-2 number, since 2×1055405169² = 2227760141503837122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1055405167) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 62082649 + ... + 62082665.

Almost surely, 2^1055405169 is an apocalyptic number.

1055405169 is the 32487-th square number.

1055405169 is the 16244-th centered octagonal number.

It is an amenable number.

1055405169 is a deficient number, since it is larger than the sum of its proper divisors (990313584).

1055405169 is an equidigital number, since it uses as much as digits as its factorization.

1055405169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The cubic root of 1055405169 is about 1018.1374342750.

Multiplying 1055405169 by its sum of digits (36), we get a square (37994586084 = 194922²).

The spelling of 1055405169 in words is "one billion, fifty-five million, four hundred five thousand, one hundred sixty-nine".