1091264023 has 8 divisors (see below), whose sum is σ = 1098240416. Its totient is φ = 1084298400.

The previous prime is 1091264021. The next prime is 1091264039. The reversal of 1091264023 is 3204621901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1091264023 - 2¹ = 1091264021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1091263982 and 1091264000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091264021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313390 + ... + 316852.

It is an arithmetic number, because the mean of its divisors is an integer number (137280052).

Almost surely, 2^1091264023 is an apocalyptic number.

1091264023 is a deficient number, since it is larger than the sum of its proper divisors (6976393).

1091264023 is a wasteful number, since it uses less digits than its factorization.

1091264023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5385.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1091264023 is about 33034.2855681790. The cubic root of 1091264023 is about 1029.5401293307.

Adding to 1091264023 its reverse (3204621901), we get a palindrome (4295885924).

The spelling of 1091264023 in words is "one billion, ninety-one million, two hundred sixty-four thousand, twenty-three".