1091472 has 20 divisors (see below), whose sum is σ = 2819760. Its totient is φ = 363808.

The previous prime is 1091471. The next prime is 1091477. The reversal of 1091472 is 2741901.

It is a super-2 number, since 2×1091472² = 2382622253568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1091471) 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, 11322 + ... + 11417.

It is an arithmetic number, because the mean of its divisors is an integer number (140988).

2^1091472 is an apocalyptic number.

1091472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1091472 is an abundant number, since it is smaller than the sum of its proper divisors (1728288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1091472 is a wasteful number, since it uses less digits than its factorization.

1091472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22750 (or 22744 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 1091472 is about 1044.7353731927. The cubic root of 1091472 is about 102.9605529656.

The spelling of 1091472 in words is "one million, ninety-one thousand, four hundred seventy-two".