21274201 has 8 divisors (see below), whose sum is σ = 22952384. Its totient is φ = 19602000.

The previous prime is 21274193. The next prime is 21274219. The reversal of 21274201 is 10247212.

It is a happy number.

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 21274201 - 2³ = 21274193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21274261) 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, 8326 + ... + 10576.

It is an arithmetic number, because the mean of its divisors is an integer number (2869048).

Almost surely, 2^21274201 is an apocalyptic number.

It is an amenable number.

21274201 is a deficient number, since it is larger than the sum of its proper divisors (1678183).

21274201 is a wasteful number, since it uses less digits than its factorization.

21274201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 21274201 is about 4612.3964487021. The cubic root of 21274201 is about 277.0880221768.

It can be divided in two parts, 2127 and 4201, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 21274201 in words is "twenty-one million, two hundred seventy-four thousand, two hundred one".