21457301 has 8 divisors (see below), whose sum is σ = 22665984. Its totient is φ = 20280960.

The previous prime is 21457279. The next prime is 21457307. The reversal of 21457301 is 10375412.

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

It is a cyclic number.

It is not a de Polignac number, because 21457301 - 2¹⁴ = 21440917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21457307) 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 7 ways as a sum of consecutive naturals, for example, 6716 + ... + 9381.

It is an arithmetic number, because the mean of its divisors is an integer number (2833248).

Almost surely, 2^21457301 is an apocalyptic number.

It is an amenable number.

21457301 is a deficient number, since it is larger than the sum of its proper divisors (1208683).

21457301 is a wasteful number, since it uses less digits than its factorization.

21457301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16171.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 21457301 is about 4632.2026078314. The cubic root of 21457301 is about 277.8806873751.

The spelling of 21457301 in words is "twenty-one million, four hundred fifty-seven thousand, three hundred one".