1025564 has 6 divisors (see below), whose sum is σ = 1794744. Its totient is φ = 512780.

The previous prime is 1025561. The next prime is 1025579. The reversal of 1025564 is 4655201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025561) 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 as a sum of consecutive naturals, namely, 128192 + ... + 128199.

It is an arithmetic number, because the mean of its divisors is an integer number (299124).

2^1025564 is an apocalyptic number.

It is an amenable number.

1025564 is a deficient number, since it is larger than the sum of its proper divisors (769180).

1025564 is a wasteful number, since it uses less digits than its factorization.

1025564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256395 (or 256393 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1025564 is about 1012.7013380064. The cubic root of 1025564 is about 100.8449734227.

The spelling of 1025564 in words is "one million, twenty-five thousand, five hundred sixty-four".