1272444545 has 8 divisors (see below), whose sum is σ = 1542675624. Its totient is φ = 1007460864.

The previous prime is 1272444533. The next prime is 1272444557. The reversal of 1272444545 is 5454442721.

It is an interprime number because it is at equal distance from previous prime (1272444533) and next prime (1272444557).

It can be written as a sum of positive squares in 4 ways, for example, as 4443664 + 1268000881 = 2108^2 + 35609^2 .

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 1272444545 - 2¹⁰ = 1272443521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1272444499 and 1272444508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1311314 + ... + 1312283.

It is an arithmetic number, because the mean of its divisors is an integer number (192834453).

Almost surely, 2^1272444545 is an apocalyptic number.

It is an amenable number.

1272444545 is a deficient number, since it is larger than the sum of its proper divisors (270231079).

1272444545 is an equidigital number, since it uses as much as digits as its factorization.

1272444545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623699.

The product of its digits is 179200, while the sum is 38.

The square root of 1272444545 is about 35671.3406672640. The cubic root of 1272444545 is about 1083.6265106845.

The spelling of 1272444545 in words is "one billion, two hundred seventy-two million, four hundred forty-four thousand, five hundred forty-five".