1084078721 has 16 divisors (see below), whose sum is σ = 1195741440. Its totient is φ = 974641920.

The previous prime is 1084078717. The next prime is 1084078727. The reversal of 1084078721 is 1278704801.

It is a cyclic number.

It is not a de Polignac number, because 1084078721 - 2² = 1084078717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1084078727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 893111 + ... + 894323.

It is an arithmetic number, because the mean of its divisors is an integer number (74733840).

Almost surely, 2^1084078721 is an apocalyptic number.

1084078721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1084078721 is a deficient number, since it is larger than the sum of its proper divisors (111662719).

1084078721 is a wasteful number, since it uses less digits than its factorization.

1084078721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 1084078721 is about 32925.3507346543. The cubic root of 1084078721 is about 1027.2755223040.

The spelling of 1084078721 in words is "one billion, eighty-four million, seventy-eight thousand, seven hundred twenty-one".