1272733397 has 8 divisors (see below), whose sum is σ = 1371090840. Its totient is φ = 1174440960.

The previous prime is 1272733349. The next prime is 1272733403. The reversal of 1272733397 is 7933372721.

It can be written as a sum of positive squares in 4 ways, for example, as 50112241 + 1222621156 = 7079^2 + 34966^2 .

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 1272733397 - 2⁶ = 1272733333 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 (1272733697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29129 + ... + 58257.

It is an arithmetic number, because the mean of its divisors is an integer number (171386355).

Almost surely, 2^1272733397 is an apocalyptic number.

1272733397 is the 29129-th pentagonal number.

It is an amenable number.

1272733397 is a deficient number, since it is larger than the sum of its proper divisors (98357443).

1272733397 is a wasteful number, since it uses less digits than its factorization.

1272733397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32503.

The product of its digits is 333396, while the sum is 44.

The square root of 1272733397 is about 35675.3892340364. The cubic root of 1272733397 is about 1083.7085008989.

The spelling of 1272733397 in words is "one billion, two hundred seventy-two million, seven hundred thirty-three thousand, three hundred ninety-seven".