21141406 has 32 divisors (see below), whose sum is σ = 38556000. Its totient is φ = 8561280.

The previous prime is 21141403. The next prime is 21141431. The reversal of 21141406 is 60414112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141403) 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 15 ways as a sum of consecutive naturals, for example, 7020 + ... + 9568.

It is an arithmetic number, because the mean of its divisors is an integer number (1204875).

Almost surely, 2^21141406 is an apocalyptic number.

21141406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21141406 is a deficient number, since it is larger than the sum of its proper divisors (17414594).

21141406 is a wasteful number, since it uses less digits than its factorization.

21141406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21141406 is about 4597.9784688491. The cubic root of 21141406 is about 276.5102843595.

Adding to 21141406 its reverse (60414112), we get a palindrome (81555518).

The spelling of 21141406 in words is "twenty-one million, one hundred forty-one thousand, four hundred six".