1091005472 has 18 divisors (see below), whose sum is σ = 2148284943. Its totient is φ = 545409312.

The previous prime is 1091005471. The next prime is 1091005493. The reversal of 1091005472 is 2745001901.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 545502736 + 545502736 = 23356^2 + 23356^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=23356.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091005471) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 183929 + ... + 189767.

Almost surely, 2^1091005472 is an apocalyptic number.

It is an amenable number.

1091005472 is a deficient number, since it is larger than the sum of its proper divisors (1057279471).

1091005472 is an frugal number, since it uses more digits than its factorization.

1091005472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11688 (or 5841 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1091005472 is about 33030.3719627860. The cubic root of 1091005472 is about 1029.4588139479.

The spelling of 1091005472 in words is "one billion, ninety-one million, five thousand, four hundred seventy-two".