1272417045 has 16 divisors (see below), whose sum is σ = 2036895552. Its totient is φ = 678279680.

The previous prime is 1272417031. The next prime is 1272417077. The reversal of 1272417045 is 5407142721.

It is not a de Polignac number, because 1272417045 - 2¹⁰ = 1272416021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1272416997 and 1272417015.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10834 + ... + 51596.

It is an arithmetic number, because the mean of its divisors is an integer number (127305972).

Almost surely, 2^1272417045 is an apocalyptic number.

1272417045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1272417045 is a deficient number, since it is larger than the sum of its proper divisors (764478507).

1272417045 is a wasteful number, since it uses less digits than its factorization.

1272417045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42852.

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 1272417045 is about 35670.9552016763. The cubic root of 1272417045 is about 1083.6187042032.

Adding to 1272417045 its reverse (5407142721), we get a palindrome (6679559766).

The spelling of 1272417045 in words is "one billion, two hundred seventy-two million, four hundred seventeen thousand, forty-five".