21061341 has 24 divisors (see below), whose sum is σ = 34978944. Its totient is φ = 11962080.

The previous prime is 21061309. The next prime is 21061343. The reversal of 21061341 is 14316012.

It is a happy number.

21061341 is a `hidden beast` number, since 2 + 10 + 613 + 41 = 666.

It is not a de Polignac number, because 21061341 - 2⁵ = 21061309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21061343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10480 + ... + 12326.

It is an arithmetic number, because the mean of its divisors is an integer number (1457456).

Almost surely, 2^21061341 is an apocalyptic number.

21061341 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21061341 is a deficient number, since it is larger than the sum of its proper divisors (13917603).

21061341 is a wasteful number, since it uses less digits than its factorization.

21061341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041 (or 2038 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 21061341 is about 4589.2636664284. The cubic root of 21061341 is about 276.1607837590.

Adding to 21061341 its reverse (14316012), we get a palindrome (35377353).

The spelling of 21061341 in words is "twenty-one million, sixty-one thousand, three hundred forty-one".