21410142 has 16 divisors (see below), whose sum is σ = 46114320. Its totient is φ = 6587712.

The previous prime is 21410141. The next prime is 21410143. The reversal of 21410142 is 24101412.

It is an interprime number because it is at equal distance from previous prime (21410141) and next prime (21410143).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21410141) 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, 137167 + ... + 137322.

It is an arithmetic number, because the mean of its divisors is an integer number (2882145).

Almost surely, 2^21410142 is an apocalyptic number.

21410142 is an abundant number, since it is smaller than the sum of its proper divisors (24704178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21410142 is a wasteful number, since it uses less digits than its factorization.

21410142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274507.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 21410142 is about 4627.1094648819. The cubic root of 21410142 is about 277.6769620399.

Adding to 21410142 its reverse (24101412), we get a palindrome (45511554).

The spelling of 21410142 in words is "twenty-one million, four hundred ten thousand, one hundred forty-two".