1272497587 has 8 divisors (see below), whose sum is σ = 1276620800. Its totient is φ = 1268382024.

The previous prime is 1272497561. The next prime is 1272497623. The reversal of 1272497587 is 7857942721.

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 1272497587 - 2⁷ = 1272497459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272467587) 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, 567214 + ... + 569452.

It is an arithmetic number, because the mean of its divisors is an integer number (159577600).

Almost surely, 2^1272497587 is an apocalyptic number.

1272497587 is a deficient number, since it is larger than the sum of its proper divisors (4123213).

1272497587 is a wasteful number, since it uses less digits than its factorization.

1272497587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825.

The product of its digits is 1975680, while the sum is 52.

The square root of 1272497587 is about 35672.0841415244. The cubic root of 1272497587 is about 1083.6415675080.

The spelling of 1272497587 in words is "one billion, two hundred seventy-two million, four hundred ninety-seven thousand, five hundred eighty-seven".