1091572 has 12 divisors (see below), whose sum is σ = 1972096. Its totient is φ = 528120.

The previous prime is 1091561. The next prime is 1091581. The reversal of 1091572 is 2751901.

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 a congruent number.

It is an unprimeable number.

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, 4278 + ... + 4525.

2^1091572 is an apocalyptic number.

It is an amenable number.

1091572 is a deficient number, since it is larger than the sum of its proper divisors (880524).

1091572 is a wasteful number, since it uses less digits than its factorization.

1091572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8838 (or 8836 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 1091572 is about 1044.7832311059. The cubic root of 1091572 is about 102.9636972640.

It can be divided in two parts, 109 and 1572, that added together give a square (1681 = 41²).

The spelling of 1091572 in words is "one million, ninety-one thousand, five hundred seventy-two".