21410087 has 8 divisors (see below), whose sum is σ = 22501776. Its totient is φ = 20345472.

The previous prime is 21410063. The next prime is 21410111. The reversal of 21410087 is 78001412.

It is an interprime number because it is at equal distance from previous prime (21410063) and next prime (21410111).

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 21410087 - 2⁶ = 21410023 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 (21410287) 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, 5138 + ... + 8319.

It is an arithmetic number, because the mean of its divisors is an integer number (2812722).

Almost surely, 2^21410087 is an apocalyptic number.

21410087 is a deficient number, since it is larger than the sum of its proper divisors (1091689).

21410087 is a wasteful number, since it uses less digits than its factorization.

21410087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13537.

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

The square root of 21410087 is about 4627.1035216429. The cubic root of 21410087 is about 277.6767242671.

Adding to 21410087 its reverse (78001412), we get a palindrome (99411499).

It can be divided in two parts, 214 and 10087, that added together give a palindrome (10301).

The spelling of 21410087 in words is "twenty-one million, four hundred ten thousand, eighty-seven".