1296272445 has 16 divisors (see below), whose sum is σ = 2233577472. Its totient is φ = 638164800.

The previous prime is 1296272431. The next prime is 1296272449. The reversal of 1296272445 is 5442726921.

It is a happy number.

It is not a de Polignac number, because 1296272445 - 2¹¹ = 1296270397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1296272397 and 1296272406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296272449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3323581 + ... + 3323970.

It is an arithmetic number, because the mean of its divisors is an integer number (139598592).

Almost surely, 2^1296272445 is an apocalyptic number.

1296272445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1296272445 is a deficient number, since it is larger than the sum of its proper divisors (937305027).

1296272445 is a wasteful number, since it uses less digits than its factorization.

1296272445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6647572.

The product of its digits is 241920, while the sum is 42.

The square root of 1296272445 is about 36003.7837594884. The cubic root of 1296272445 is about 1090.3487493309.

The spelling of 1296272445 in words is "one billion, two hundred ninety-six million, two hundred seventy-two thousand, four hundred forty-five".