907221 has 8 divisors (see below), whose sum is σ = 1382464. Its totient is φ = 518400.

The previous prime is 907217. The next prime is 907223. The reversal of 907221 is 122709.

It is a happy number.

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

It is not a de Polignac number, because 907221 - 2² = 907217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 43201 = 907221 / (9 + 0 + 7 + 2 + 2 + 1).

It is a Duffinian number.

907221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (907223) 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, 21580 + ... + 21621.

It is an arithmetic number, because the mean of its divisors is an integer number (172808).

2⁹⁰⁷²²¹ is an apocalyptic number.

It is an amenable number.

907221 is a deficient number, since it is larger than the sum of its proper divisors (475243).

907221 is a wasteful number, since it uses less digits than its factorization.

907221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43211.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 907221 is about 952.4814958833. The cubic root of 907221 is about 96.8064657134.

It can be divided in two parts, 907 and 221, that added together give a triangular number (1128 = T₄₇).

The spelling of 907221 in words is "nine hundred seven thousand, two hundred twenty-one".