1053521 has 4 divisors (see below), whose sum is σ = 1204032. Its totient is φ = 903012.

The previous prime is 1053511. The next prime is 1053529. The reversal of 1053521 is 1253501.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1253501 = 199 ⋅6299.

It is a cyclic number.

It is not a de Polignac number, because 1053521 - 2¹⁴ = 1037137 is a prime.

It is a super-2 number, since 2×1053521² = 2219812994882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1053521.

It is not an unprimeable number, because it can be changed into a prime (1053529) 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, 75245 + ... + 75258.

It is an arithmetic number, because the mean of its divisors is an integer number (301008).

2^1053521 is an apocalyptic number.

It is an amenable number.

1053521 is a deficient number, since it is larger than the sum of its proper divisors (150511).

1053521 is an equidigital number, since it uses as much as digits as its factorization.

1053521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150510.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1053521 is about 1026.4117107672. The cubic root of 1053521 is about 101.7531194523.

The spelling of 1053521 in words is "one million, fifty-three thousand, five hundred twenty-one".