1055645 has 4 divisors (see below), whose sum is σ = 1266780. Its totient is φ = 844512.

The previous prime is 1055611. The next prime is 1055671. The reversal of 1055645 is 5465501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5465501 = 1301 ⋅4201.

It can be written as a sum of positive squares in 2 ways, for example, as 521284 + 534361 = 722^2 + 731^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055645 - 2¹⁰ = 1054621 is a prime.

It is a super-2 number, since 2×1055645² = 2228772732050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105560 + ... + 105569.

It is an arithmetic number, because the mean of its divisors is an integer number (316695).

2^1055645 is an apocalyptic number.

It is an amenable number.

1055645 is a deficient number, since it is larger than the sum of its proper divisors (211135).

1055645 is an equidigital number, since it uses as much as digits as its factorization.

1055645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211134.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1055645 is about 1027.4458623207. The cubic root of 1055645 is about 101.8214549186.

It can be divided in two parts, 10556 and 45, that added together give a palindrome (10601).

The spelling of 1055645 in words is "one million, fifty-five thousand, six hundred forty-five".