1272427046 has 48 divisors (see below), whose sum is σ = 2161782000. Its totient is φ = 560947200.

The previous prime is 1272427043. The next prime is 1272427081. The reversal of 1272427046 is 6407242721.

It is a super-2 number, since 2×1272427046² = 3238141174784572232, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1272426997 and 1272427015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272427043) 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 23 ways as a sum of consecutive naturals, for example, 2549705 + ... + 2550203.

It is an arithmetic number, because the mean of its divisors is an integer number (45037125).

Almost surely, 2^1272427046 is an apocalyptic number.

1272427046 is a deficient number, since it is larger than the sum of its proper divisors (889354954).

1272427046 is a wasteful number, since it uses less digits than its factorization.

1272427046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 1272427046 is about 35671.0953854798. The cubic root of 1272427046 is about 1083.6215432206.

Adding to 1272427046 its reverse (6407242721), we get a palindrome (7679669767).

The spelling of 1272427046 in words is "one billion, two hundred seventy-two million, four hundred twenty-seven thousand, forty-six".