1022272729 has 3 divisors (see below), whose sum is σ = 1022304703. Its totient is φ = 1022240756.

The previous prime is 1022272723. The next prime is 1022272787. The reversal of 1022272729 is 9272722201.

The square root of 1022272729 is 31973.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9272722201 = 31 ⋅299120071.

It can be written as a sum of positive squares in only one way, i.e., 985646025 + 36626704 = 31395^2 + 6052^2 .

It is not a de Polignac number, because 1022272729 - 2²¹ = 1020175577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022272694 and 1022272703.

It is not an unprimeable number, because it can be changed into a prime (1022272723) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15987 + ... + 47959.

Almost surely, 2^1022272729 is an apocalyptic number.

1022272729 is the 31973-rd square number.

1022272729 is the 15987-th centered octagonal number.

It is an amenable number.

1022272729 is a deficient number, since it is larger than the sum of its proper divisors (31974).

1022272729 is an frugal number, since it uses more digits than its factorization.

1022272729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63946 (or 31973 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The cubic root of 1022272729 is about 1007.3697956842.

The spelling of 1022272729 in words is "one billion, twenty-two million, two hundred seventy-two thousand, seven hundred twenty-nine".