21345141 has 8 divisors (see below), whose sum is σ = 28753984. Its totient is φ = 14083200.

The previous prime is 21345119. The next prime is 21345187. The reversal of 21345141 is 14154312.

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

It is not a de Polignac number, because 21345141 - 2⁹ = 21344629 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 (21345101) 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, 36385 + ... + 36966.

It is an arithmetic number, because the mean of its divisors is an integer number (3594248).

Almost surely, 2^21345141 is an apocalyptic number.

It is an amenable number.

21345141 is a deficient number, since it is larger than the sum of its proper divisors (7408843).

21345141 is an equidigital number, since it uses as much as digits as its factorization.

21345141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73451.

The product of its digits is 480, while the sum is 21.

The square root of 21345141 is about 4620.0801941092. The cubic root of 21345141 is about 277.3956689204.

Adding to 21345141 its reverse (14154312), we get a palindrome (35499453).

It can be divided in two parts, 213 and 45141, that added together give a palindrome (45354).

The spelling of 21345141 in words is "twenty-one million, three hundred forty-five thousand, one hundred forty-one".