7644025 has 6 divisors (see below), whose sum is σ = 9478622. Its totient is φ = 6115200.

The previous prime is 7644019. The next prime is 7644029. The reversal of 7644025 is 5204467.

It can be written as a sum of positive squares in 3 ways, for example, as 1308736 + 6335289 = 1144^2 + 2517^2 .

It is not a de Polignac number, because 7644025 - 2³ = 7644017 is a prime.

It is a super-2 number, since 2×7644025² = 116862236401250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7643984 and 7644002.

It is not an unprimeable number, because it can be changed into a prime (7644029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 152856 + ... + 152905.

Almost surely, 2^7644025 is an apocalyptic number.

It is an amenable number.

7644025 is a deficient number, since it is larger than the sum of its proper divisors (1834597).

7644025 is a wasteful number, since it uses less digits than its factorization.

7644025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305771 (or 305766 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 7644025 is about 2764.7829932926. The cubic root of 7644025 is about 196.9884212491.

The spelling of 7644025 in words is "seven million, six hundred forty-four thousand, twenty-five".