7270921 has 8 divisors (see below), whose sum is σ = 8671104. Its totient is φ = 5961120.

The previous prime is 7270919. The next prime is 7270931. The reversal of 7270921 is 1290727.

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 7270921 - 2¹ = 7270919 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7270921.

It is not an unprimeable number, because it can be changed into a prime (7270931) 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, 22420 + ... + 22741.

It is an arithmetic number, because the mean of its divisors is an integer number (1083888).

Almost surely, 2^7270921 is an apocalyptic number.

It is an amenable number.

7270921 is a deficient number, since it is larger than the sum of its proper divisors (1400183).

7270921 is a wasteful number, since it uses less digits than its factorization.

7270921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45191.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 7270921 is about 2696.4645371301. The cubic root of 7270921 is about 193.7298201667.

The spelling of 7270921 in words is "seven million, two hundred seventy thousand, nine hundred twenty-one".