1055521 has 4 divisors (see below), whose sum is σ = 1080112. Its totient is φ = 1030932.

The previous prime is 1055503. The next prime is 1055531. The reversal of 1055521 is 1255501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1055521 - 2⁵ = 1055489 is a prime.

It is a super-2 number, since 2×1055521² = 2228249162882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12231 + ... + 12316.

It is an arithmetic number, because the mean of its divisors is an integer number (270028).

2^1055521 is an apocalyptic number.

It is an amenable number.

1055521 is a deficient number, since it is larger than the sum of its proper divisors (24591).

1055521 is an equidigital number, since it uses as much as digits as its factorization.

1055521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24590.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 1055521 is about 1027.3855167365. The cubic root of 1055521 is about 101.8174679865.

The spelling of 1055521 in words is "one million, fifty-five thousand, five hundred twenty-one".