1025557 has 4 divisors (see below), whose sum is σ = 1104460. Its totient is φ = 946656.

The previous prime is 1025551. The next prime is 1025561. The reversal of 1025557 is 7555201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53361 + 972196 = 231^2 + 986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025557 is a prime.

It is a Duffinian number.

1025557 is a lucky number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39432 + ... + 39457.

It is an arithmetic number, because the mean of its divisors is an integer number (276115).

2^1025557 is an apocalyptic number.

It is an amenable number.

1025557 is a deficient number, since it is larger than the sum of its proper divisors (78903).

1025557 is an equidigital number, since it uses as much as digits as its factorization.

1025557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78902.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 1025557 is about 1012.6978818977. The cubic root of 1025557 is about 100.8447439826.

The spelling of 1025557 in words is "one million, twenty-five thousand, five hundred fifty-seven".