1025553 has 4 divisors (see below), whose sum is σ = 1367408. Its totient is φ = 683700.

The previous prime is 1025551. The next prime is 1025561. The reversal of 1025553 is 3555201.

1025553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 1025553 - 2¹ = 1025551 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1025551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170923 + ... + 170928.

It is an arithmetic number, because the mean of its divisors is an integer number (341852).

2^1025553 is an apocalyptic number.

It is an amenable number.

1025553 is a deficient number, since it is larger than the sum of its proper divisors (341855).

1025553 is an equidigital number, since it uses as much as digits as its factorization.

1025553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341854.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 1025553 is about 1012.6959069731. The cubic root of 1025553 is about 100.8446128735.

The spelling of 1025553 in words is "one million, twenty-five thousand, five hundred fifty-three".