1081014721 has 4 divisors (see below), whose sum is σ = 1081100500. Its totient is φ = 1080928944.

The previous prime is 1081014719. The next prime is 1081014757. The reversal of 1081014721 is 1274101801.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1274101801 = 7 ⋅182014543.

It can be written as a sum of positive squares in 2 ways, for example, as 446730496 + 634284225 = 21136^2 + 25185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081014721 - 2¹ = 1081014719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081014761) 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, 19866 + ... + 50563.

It is an arithmetic number, because the mean of its divisors is an integer number (270275125).

Almost surely, 2^1081014721 is an apocalyptic number.

It is an amenable number.

1081014721 is a deficient number, since it is larger than the sum of its proper divisors (85779).

1081014721 is an equidigital number, since it uses as much as digits as its factorization.

1081014721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85778.

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 1081014721 is about 32878.7883140483. The cubic root of 1081014721 is about 1026.3067912213.

The spelling of 1081014721 in words is "one billion, eighty-one million, fourteen thousand, seven hundred twenty-one".