1036725721 has 2 divisors, whose sum is σ = 1036725722. Its totient is φ = 1036725720.

The previous prime is 1036725707. The next prime is 1036725733. The reversal of 1036725721 is 1275276301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 773118025 + 263607696 = 27805^2 + 16236^2 .

It is a cyclic number.

It is not a de Polignac number, because 1036725721 - 2¹⁷ = 1036594649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1036725791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 518362860 + 518362861.

It is an arithmetic number, because the mean of its divisors is an integer number (518362861).

Almost surely, 2^1036725721 is an apocalyptic number.

It is an amenable number.

1036725721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1036725721 is an equidigital number, since it uses as much as digits as its factorization.

1036725721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 1036725721 is about 32198.2254324675. The cubic root of 1036725721 is about 1012.0950275168.

The spelling of 1036725721 in words is "one billion, thirty-six million, seven hundred twenty-five thousand, seven hundred twenty-one".