10261987 has 8 divisors (see below), whose sum is σ = 10583456. Its totient is φ = 9942912.

The previous prime is 10261973. The next prime is 10262009. The reversal of 10261987 is 78916201.

It is a happy number.

10261987 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 10261987 - 2⁷ = 10261859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10261187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12058 + ... + 12880.

It is an arithmetic number, because the mean of its divisors is an integer number (1322932).

Almost surely, 2^10261987 is an apocalyptic number.

10261987 is a deficient number, since it is larger than the sum of its proper divisors (321469).

10261987 is an equidigital number, since it uses as much as digits as its factorization.

10261987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 10261987 is about 3203.4336265951. The cubic root of 10261987 is about 217.3087198363.

The spelling of 10261987 in words is "ten million, two hundred sixty-one thousand, nine hundred eighty-seven".