21401301 has 16 divisors (see below), whose sum is σ = 29373120. Its totient is φ = 13854720.

The previous prime is 21401299. The next prime is 21401321. The reversal of 21401301 is 10310412.

It is a happy number.

It is not a de Polignac number, because 21401301 - 2¹ = 21401299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401321) 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, 14485 + ... + 15893.

It is an arithmetic number, because the mean of its divisors is an integer number (1835820).

Almost surely, 2^21401301 is an apocalyptic number.

It is an amenable number.

21401301 is a deficient number, since it is larger than the sum of its proper divisors (7971819).

21401301 is a wasteful number, since it uses less digits than its factorization.

21401301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21401301 is about 4626.1540181883. The cubic root of 21401301 is about 277.6387359193.

Adding to 21401301 its reverse (10310412), we get a palindrome (31711713).

The spelling of 21401301 in words is "twenty-one million, four hundred one thousand, three hundred one".