1072721032 has 8 divisors (see below), whose sum is σ = 2011351950. Its totient is φ = 536360512.

The previous prime is 1072721021. The next prime is 1072721047. The reversal of 1072721032 is 2301272701.

It can be written as a sum of positive squares in only one way, i.e., 745617636 + 327103396 = 27306^2 + 18086^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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

It is a junction number, because it is equal to n+sod(n) for n = 1072720988 and 1072721006.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67045057 + ... + 67045072.

Almost surely, 2^1072721032 is an apocalyptic number.

It is an amenable number.

1072721032 is a deficient number, since it is larger than the sum of its proper divisors (938630918).

1072721032 is a wasteful number, since it uses less digits than its factorization.

1072721032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134090135 (or 134090131 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 1072721032 is about 32752.4202464490. The cubic root of 1072721032 is about 1023.6753960751.

Adding to 1072721032 its reverse (2301272701), we get a palindrome (3373993733).

The spelling of 1072721032 in words is "one billion, seventy-two million, seven hundred twenty-one thousand, thirty-two".