1272723733 has 8 divisors (see below), whose sum is σ = 1290106880. Its totient is φ = 1255372560.

The previous prime is 1272723719. The next prime is 1272723779. The reversal of 1272723733 is 3373272721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1272723733 - 2⁵ = 1272723701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1272723692 and 1272723701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272723233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78463 + ... + 93283.

It is an arithmetic number, because the mean of its divisors is an integer number (161263360).

Almost surely, 2^1272723733 is an apocalyptic number.

It is an amenable number.

1272723733 is a deficient number, since it is larger than the sum of its proper divisors (17383147).

1272723733 is a wasteful number, since it uses less digits than its factorization.

1272723733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15987.

The product of its digits is 74088, while the sum is 37.

The square root of 1272723733 is about 35675.2537902676. The cubic root of 1272723733 is about 1083.7057579873.

The spelling of 1272723733 in words is "one billion, two hundred seventy-two million, seven hundred twenty-three thousand, seven hundred thirty-three".