10021487 has 8 divisors (see below), whose sum is σ = 11762976. Its totient is φ = 8357472.

The previous prime is 10021469. The next prime is 10021499. The reversal of 10021487 is 78412001.

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 10021487 - 2⁶ = 10021423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19088 + ... + 19605.

It is an arithmetic number, because the mean of its divisors is an integer number (1470372).

Almost surely, 2^10021487 is an apocalyptic number.

10021487 is a deficient number, since it is larger than the sum of its proper divisors (1741489).

10021487 is an equidigital number, since it uses as much as digits as its factorization.

10021487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38737.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 10021487 is about 3165.6732301360. The cubic root of 10021487 is about 215.5976664085.

Adding to 10021487 its reverse (78412001), we get a palindrome (88433488).

The spelling of 10021487 in words is "ten million, twenty-one thousand, four hundred eighty-seven".