1078606721 has 16 divisors (see below), whose sum is σ = 1137628800. Its totient is φ = 1021288320.

The previous prime is 1078606651. The next prime is 1078606751. The reversal of 1078606721 is 1276068701.

It is a cyclic number.

It is not a de Polignac number, because 1078606721 - 2¹⁸ = 1078344577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1078606751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 908090 + ... + 909276.

It is an arithmetic number, because the mean of its divisors is an integer number (71101800).

Almost surely, 2^1078606721 is an apocalyptic number.

It is an amenable number.

1078606721 is a deficient number, since it is larger than the sum of its proper divisors (59022079).

1078606721 is a wasteful number, since it uses less digits than its factorization.

1078606721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 1078606721 is about 32842.1485442107. The cubic root of 1078606721 is about 1025.5441793331.

The spelling of 1078606721 in words is "one billion, seventy-eight million, six hundred six thousand, seven hundred twenty-one".