1081321092 has 18 divisors (see below), whose sum is σ = 2733339518. Its totient is φ = 360440352.

The previous prime is 1081321067. The next prime is 1081321133. The reversal of 1081321092 is 2901231801.

It can be written as a sum of positive squares in only one way, i.e., 1076758596 + 4562496 = 32814^2 + 2136^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15018313 + ... + 15018384.

Almost surely, 2^1081321092 is an apocalyptic number.

1081321092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1081321092 is an abundant number, since it is smaller than the sum of its proper divisors (1652018426).

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

1081321092 is a wasteful number, since it uses less digits than its factorization.

1081321092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30036707 (or 30036702 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1081321092 is about 32883.4470820807. The cubic root of 1081321092 is about 1026.4037374615.

Adding to 1081321092 its reverse (2901231801), we get a palindrome (3982552893).

The spelling of 1081321092 in words is "one billion, eighty-one million, three hundred twenty-one thousand, ninety-two".