1200056887 has 4 divisors (see below), whose sum is σ = 1200239496. Its totient is φ = 1199874280.

The previous prime is 1200056863. The next prime is 1200056933. The reversal of 1200056887 is 7886500021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7886500021 = 41597 ⋅189593.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200056887 is a prime.

It is a super-2 number, since 2×1200056887² = 2880273064072261538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200056807) 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 3 ways as a sum of consecutive naturals, for example, 81064 + ... + 94717.

It is an arithmetic number, because the mean of its divisors is an integer number (300059874).

Almost surely, 2^1200056887 is an apocalyptic number.

1200056887 is a deficient number, since it is larger than the sum of its proper divisors (182609).

1200056887 is an equidigital number, since it uses as much as digits as its factorization.

1200056887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182608.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 1200056887 is about 34641.8372347657. The cubic root of 1200056887 is about 1062.6753609889.

The spelling of 1200056887 in words is "one billion, two hundred million, fifty-six thousand, eight hundred eighty-seven".