1272546542 has 16 divisors (see below), whose sum is σ = 1922814720. Its totient is φ = 631617912.

The previous prime is 1272546533. The next prime is 1272546547. The reversal of 1272546542 is 2456452721.

It is a junction number, because it is equal to n+sod(n) for n = 1272546496 and 1272546505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272546547) 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, 357809 + ... + 361347.

It is an arithmetic number, because the mean of its divisors is an integer number (120175920).

Almost surely, 2^1272546542 is an apocalyptic number.

1272546542 is a deficient number, since it is larger than the sum of its proper divisors (650268178).

1272546542 is a wasteful number, since it uses less digits than its factorization.

1272546542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4807.

The product of its digits is 134400, while the sum is 38.

The square root of 1272546542 is about 35672.7703157464. The cubic root of 1272546542 is about 1083.6554637996.

The spelling of 1272546542 in words is "one billion, two hundred seventy-two million, five hundred forty-six thousand, five hundred forty-two".