1078729 has 4 divisors (see below), whose sum is σ = 1082320. Its totient is φ = 1075140.

The previous prime is 1078717. The next prime is 1078733. The reversal of 1078729 is 9278701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9278701 = 727 ⋅12763.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1078729 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1078694 and 1078703.

It is not an unprimeable number, because it can be changed into a prime (1078739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299 + ... + 1960.

It is an arithmetic number, because the mean of its divisors is an integer number (270580).

2^1078729 is an apocalyptic number.

It is an amenable number.

1078729 is a deficient number, since it is larger than the sum of its proper divisors (3591).

1078729 is an equidigital number, since it uses as much as digits as its factorization.

1078729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3590.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 1078729 is about 1038.6187943610. The cubic root of 1078729 is about 102.5582932345.

It can be divided in two parts, 10787 and 29, that added together give a square (10816 = 104²).

The spelling of 1078729 in words is "one million, seventy-eight thousand, seven hundred twenty-nine".