1072728061 has 4 divisors (see below), whose sum is σ = 1107332224. Its totient is φ = 1038123900.

The previous prime is 1072728031. The next prime is 1072728071. The reversal of 1072728061 is 1608272701.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1072728061 - 2⁷ = 1072727933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072728001) 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, 17302035 + ... + 17302096.

It is an arithmetic number, because the mean of its divisors is an integer number (276833056).

Almost surely, 2^1072728061 is an apocalyptic number.

It is an amenable number.

1072728061 is a deficient number, since it is larger than the sum of its proper divisors (34604163).

1072728061 is an equidigital number, since it uses as much as digits as its factorization.

1072728061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34604162.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 1072728061 is about 32752.5275513204. The cubic root of 1072728061 is about 1023.6776319465.

The spelling of 1072728061 in words is "one billion, seventy-two million, seven hundred twenty-eight thousand, sixty-one".