1091545474 has 16 divisors (see below), whose sum is σ = 1649707488. Its totient is φ = 541652832.

The previous prime is 1091545457. The next prime is 1091545493. The reversal of 1091545474 is 4745451901.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277429 + ... + 281335.

It is an arithmetic number, because the mean of its divisors is an integer number (103106718).

Almost surely, 2^1091545474 is an apocalyptic number.

1091545474 is a deficient number, since it is larger than the sum of its proper divisors (558162014).

1091545474 is a wasteful number, since it uses less digits than its factorization.

1091545474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4929.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 1091545474 is about 33038.5452766916. The cubic root of 1091545474 is about 1029.6286322610.

The spelling of 1091545474 in words is "one billion, ninety-one million, five hundred forty-five thousand, four hundred seventy-four".