1207172587 has 4 divisors (see below), whose sum is σ = 1207384416. Its totient is φ = 1206960760.

The previous prime is 1207172579. The next prime is 1207172591. The reversal of 1207172587 is 7852717021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1207172587 - 2³ = 1207172579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1207172507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97123 + ... + 108844.

It is an arithmetic number, because the mean of its divisors is an integer number (301846104).

Almost surely, 2^1207172587 is an apocalyptic number.

1207172587 is a deficient number, since it is larger than the sum of its proper divisors (211829).

1207172587 is an equidigital number, since it uses as much as digits as its factorization.

1207172587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211828.

The product of its (nonzero) digits is 54880, while the sum is 40.

The square root of 1207172587 is about 34744.3892880563. The cubic root of 1207172587 is about 1064.7715900946.

The spelling of 1207172587 in words is "one billion, two hundred seven million, one hundred seventy-two thousand, five hundred eighty-seven".