7924645 has 4 divisors (see below), whose sum is σ = 9509580. Its totient is φ = 6339712.

The previous prime is 7924643. The next prime is 7924681. The reversal of 7924645 is 5464297.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5464297 = 1283 ⋅4259.

It can be written as a sum of positive squares in 2 ways, for example, as 3602404 + 4322241 = 1898^2 + 2079^2 .

It is a cyclic number.

It is not a de Polignac number, because 7924645 - 2¹ = 7924643 is a prime.

It is a d-powerful number, because it can be written as 7⁸ + 9⁵ + 2²¹ + 4⁴ + 6 + 4⁴ + 5⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7924643) 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, 792460 + ... + 792469.

It is an arithmetic number, because the mean of its divisors is an integer number (2377395).

Almost surely, 2^7924645 is an apocalyptic number.

It is an amenable number.

7924645 is a deficient number, since it is larger than the sum of its proper divisors (1584935).

7924645 is a wasteful number, since it uses less digits than its factorization.

7924645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584934.

The product of its digits is 60480, while the sum is 37.

The square root of 7924645 is about 2815.0745993668. The cubic root of 7924645 is about 199.3700596254.

The spelling of 7924645 in words is "seven million, nine hundred twenty-four thousand, six hundred forty-five".