1081564 has 24 divisors (see below), whose sum is σ = 2112768. Its totient is φ = 480240.

The previous prime is 1081541. The next prime is 1081583. The reversal of 1081564 is 4651801.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1807 + ... + 2329.

It is an arithmetic number, because the mean of its divisors is an integer number (88032).

2^1081564 is an apocalyptic number.

It is an amenable number.

1081564 is a deficient number, since it is larger than the sum of its proper divisors (1031204).

1081564 is a wasteful number, since it uses less digits than its factorization.

1081564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1081564 is about 1039.9826921637. The cubic root of 1081564 is about 102.6480588828.

The spelling of 1081564 in words is "one million, eighty-one thousand, five hundred sixty-four".