1271495245 has 8 divisors (see below), whose sum is σ = 1526177016. Its totient is φ = 1016941056.

The previous prime is 1271495243. The next prime is 1271495279. The reversal of 1271495245 is 5425941721.

It can be written as a sum of positive squares in 4 ways, for example, as 43903876 + 1227591369 = 6626^2 + 35037^2 .

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 1271495245 - 2¹ = 1271495243 is a prime.

It is a super-2 number, since 2×1271495245² = 3233400316115220050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1271495198 and 1271495207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271495243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8392 + ... + 51121.

It is an arithmetic number, because the mean of its divisors is an integer number (190772127).

Almost surely, 2^1271495245 is an apocalyptic number.

It is an amenable number.

1271495245 is a deficient number, since it is larger than the sum of its proper divisors (254681771).

1271495245 is an equidigital number, since it uses as much as digits as its factorization.

1271495245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63791.

The product of its digits is 100800, while the sum is 40.

The square root of 1271495245 is about 35658.0319843931. The cubic root of 1271495245 is about 1083.3569658487.

The spelling of 1271495245 in words is "one billion, two hundred seventy-one million, four hundred ninety-five thousand, two hundred forty-five".