21069141 has 8 divisors (see below), whose sum is σ = 28114464. Its totient is φ = 14034960.

The previous prime is 21069131. The next prime is 21069163. The reversal of 21069141 is 14196012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21069141 - 2¹⁷ = 20938069 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21069101) 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, 3975 + ... + 7611.

It is an arithmetic number, because the mean of its divisors is an integer number (3514308).

Almost surely, 2^21069141 is an apocalyptic number.

It is an amenable number.

21069141 is a deficient number, since it is larger than the sum of its proper divisors (7045323).

21069141 is a wasteful number, since it uses less digits than its factorization.

21069141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 21069141 is about 4590.1133972921. The cubic root of 21069141 is about 276.1948713044.

The spelling of 21069141 in words is "twenty-one million, sixty-nine thousand, one hundred forty-one".