1084375721 has 16 divisors (see below), whose sum is σ = 1276309440. Its totient is φ = 908281920.

The previous prime is 1084375717. The next prime is 1084375723. The reversal of 1084375721 is 1275734801.

It is not a de Polignac number, because 1084375721 - 2² = 1084375717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1084375723) 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, 73775 + ... + 87243.

It is an arithmetic number, because the mean of its divisors is an integer number (79769340).

Almost surely, 2^1084375721 is an apocalyptic number.

1084375721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1084375721 is a deficient number, since it is larger than the sum of its proper divisors (191933719).

1084375721 is a wasteful number, since it uses less digits than its factorization.

1084375721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14056.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 1084375721 is about 32929.8606283112. The cubic root of 1084375721 is about 1027.3693263689.

The spelling of 1084375721 in words is "one billion, eighty-four million, three hundred seventy-five thousand, seven hundred twenty-one".