7921445 has 16 divisors (see below), whose sum is σ = 10990080. Its totient is φ = 5368704.

The previous prime is 7921411. The next prime is 7921447. The reversal of 7921445 is 5441297.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7921445 - 2⁸ = 7921189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1844 + ... + 4386.

It is an arithmetic number, because the mean of its divisors is an integer number (686880).

Almost surely, 2^7921445 is an apocalyptic number.

It is an amenable number.

7921445 is a deficient number, since it is larger than the sum of its proper divisors (3068635).

7921445 is a wasteful number, since it uses less digits than its factorization.

7921445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644.

The product of its digits is 10080, while the sum is 32.

The square root of 7921445 is about 2814.5061733810. The cubic root of 7921445 is about 199.3432205648.

The spelling of 7921445 in words is "seven million, nine hundred twenty-one thousand, four hundred forty-five".