7232921 has 4 divisors (see below), whose sum is σ = 7248144. Its totient is φ = 7217700.

The previous prime is 7232917. The next prime is 7232947. The reversal of 7232921 is 1292327.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1292327 = 29 ⋅44563.

It is not a de Polignac number, because 7232921 - 2² = 7232917 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7432921) 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, 6875 + ... + 7856.

It is an arithmetic number, because the mean of its divisors is an integer number (1812036).

Almost surely, 2^7232921 is an apocalyptic number.

It is an amenable number.

7232921 is a deficient number, since it is larger than the sum of its proper divisors (15223).

7232921 is a wasteful number, since it uses less digits than its factorization.

7232921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15222.

The product of its digits is 1512, while the sum is 26.

The square root of 7232921 is about 2689.4090428940. The cubic root of 7232921 is about 193.3917339094.

The spelling of 7232921 in words is "seven million, two hundred thirty-two thousand, nine hundred twenty-one".