1272426997 has 8 divisors (see below), whose sum is σ = 1334845440. Its totient is φ = 1211244720.

The previous prime is 1272426943. The next prime is 1272427027. The reversal of 1272426997 is 7996242721.

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 1272426997 - 2¹¹ = 1272424949 is a prime.

It is a super-3 number, since 3×1272426997³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1272426997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272420997) 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, 306933 + ... + 311050.

It is an arithmetic number, because the mean of its divisors is an integer number (166855680).

Almost surely, 2^1272426997 is an apocalyptic number.

It is an amenable number.

1272426997 is a deficient number, since it is larger than the sum of its proper divisors (62418443).

1272426997 is an equidigital number, since it uses as much as digits as its factorization.

1272426997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618083.

The product of its digits is 762048, while the sum is 49.

The square root of 1272426997 is about 35671.0946986492. The cubic root of 1272426997 is about 1083.6215293108.

The spelling of 1272426997 in words is "one billion, two hundred seventy-two million, four hundred twenty-six thousand, nine hundred ninety-seven".