21026141 has 16 divisors (see below), whose sum is σ = 22848000. Its totient is φ = 19288368.

The previous prime is 21026129. The next prime is 21026143. The reversal of 21026141 is 14162012.

It is a cyclic number.

It is not a de Polignac number, because 21026141 - 2¹⁰ = 21025117 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 (21026143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105560 + ... + 105758.

It is an arithmetic number, because the mean of its divisors is an integer number (1428000).

Almost surely, 2^21026141 is an apocalyptic number.

It is an amenable number.

21026141 is a deficient number, since it is larger than the sum of its proper divisors (1821859).

21026141 is a wasteful number, since it uses less digits than its factorization.

21026141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 21026141 is about 4585.4270248255. The cubic root of 21026141 is about 276.0068480062.

Adding to 21026141 its reverse (14162012), we get a palindrome (35188153).

The spelling of 21026141 in words is "twenty-one million, twenty-six thousand, one hundred forty-one".