21452141 has 8 divisors (see below), whose sum is σ = 22709280. Its totient is φ = 20229552.

The previous prime is 21452131. The next prime is 21452149. The reversal of 21452141 is 14125412.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21452141 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21452149) 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, 7355 + ... + 9848.

It is an arithmetic number, because the mean of its divisors is an integer number (2838660).

Almost surely, 2^21452141 is an apocalyptic number.

It is an amenable number.

21452141 is a deficient number, since it is larger than the sum of its proper divisors (1257139).

21452141 is a wasteful number, since it uses less digits than its factorization.

21452141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17275.

The product of its digits is 320, while the sum is 20.

The square root of 21452141 is about 4631.6456038864. The cubic root of 21452141 is about 277.8584108968.

Adding to 21452141 its reverse (14125412), we get a palindrome (35577553).

The spelling of 21452141 in words is "twenty-one million, four hundred fifty-two thousand, one hundred forty-one".