921201 has 4 divisors (see below), whose sum is σ = 1228272. Its totient is φ = 614132.

The previous prime is 921199. The next prime is 921203. The reversal of 921201 is 102129.

It is a happy number.

921201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (921199) and next prime (921203).

It is a cyclic number.

It is not a de Polignac number, because 921201 - 2¹ = 921199 is a prime.

It is a super-2 number, since 2×921201² = 1697222564802, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 921201.

It is not an unprimeable number, because it can be changed into a prime (921203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153531 + ... + 153536.

It is an arithmetic number, because the mean of its divisors is an integer number (307068).

2⁹²¹²⁰¹ is an apocalyptic number.

It is an amenable number.

921201 is a deficient number, since it is larger than the sum of its proper divisors (307071).

921201 is a wasteful number, since it uses less digits than its factorization.

921201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307070.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 921201 is about 959.7921650024. The cubic root of 921201 is about 97.3011859286.

The spelling of 921201 in words is "nine hundred twenty-one thousand, two hundred one".