1072060721 has 4 divisors (see below), whose sum is σ = 1080502272. Its totient is φ = 1063619172.

The previous prime is 1072060711. The next prime is 1072060723. The reversal of 1072060721 is 1270602701.

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: 1270602701 = 59 ⋅21535639.

It is a cyclic number.

It is not a de Polignac number, because 1072060721 - 2⁶ = 1072060657 is a prime.

It is a super-2 number, since 2×1072060721² = 2298628379022079682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1072060723) 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, 4220585 + ... + 4220838.

It is an arithmetic number, because the mean of its divisors is an integer number (270125568).

Almost surely, 2^1072060721 is an apocalyptic number.

It is an amenable number.

1072060721 is a deficient number, since it is larger than the sum of its proper divisors (8441551).

1072060721 is an equidigital number, since it uses as much as digits as its factorization.

1072060721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8441550.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 1072060721 is about 32742.3383557131. The cubic root of 1072060721 is about 1023.4653126071.

The spelling of 1072060721 in words is "one billion, seventy-two million, sixty thousand, seven hundred twenty-one".