1036591721 has 16 divisors (see below), whose sum is σ = 1215682560. Its totient is φ = 873755280.

The previous prime is 1036591681. The next prime is 1036591723. The reversal of 1036591721 is 1271956301.

1036591721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1036591721 - 2¹⁸ = 1036329577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1036591723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42941 + ... + 62586.

It is an arithmetic number, because the mean of its divisors is an integer number (75980160).

Almost surely, 2^1036591721 is an apocalyptic number.

1036591721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1036591721 is a deficient number, since it is larger than the sum of its proper divisors (179090839).

1036591721 is a wasteful number, since it uses less digits than its factorization.

1036591721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105604.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 1036591721 is about 32196.1445052043. The cubic root of 1036591721 is about 1012.0514201690.

The spelling of 1036591721 in words is "one billion, thirty-six million, five hundred ninety-one thousand, seven hundred twenty-one".