10156987 has 4 divisors (see below), whose sum is σ = 10393240. Its totient is φ = 9920736.

The previous prime is 10156957. The next prime is 10157023. The reversal of 10156987 is 78965101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78965101 = 2161 ⋅36541.

It is a cyclic number.

It is not a de Polignac number, because 10156987 - 2⁷ = 10156859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10156957) 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, 118062 + ... + 118147.

It is an arithmetic number, because the mean of its divisors is an integer number (2598310).

Almost surely, 2^10156987 is an apocalyptic number.

10156987 is a deficient number, since it is larger than the sum of its proper divisors (236253).

10156987 is an equidigital number, since it uses as much as digits as its factorization.

10156987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236252.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 10156987 is about 3187.0028239711. The cubic root of 10156987 is about 216.5650145119.

The spelling of 10156987 in words is "ten million, one hundred fifty-six thousand, nine hundred eighty-seven".