7649545 has 4 divisors (see below), whose sum is σ = 9179460. Its totient is φ = 6119632.

The previous prime is 7649539. The next prime is 7649557. The reversal of 7649545 is 5459467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5459467 = 13 ⋅419959.

It can be written as a sum of positive squares in 2 ways, for example, as 3087049 + 4562496 = 1757^2 + 2136^2 .

It is a cyclic number.

It is not a de Polignac number, because 7649545 - 2⁵ = 7649513 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

7649545 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7649498 and 7649507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764950 + ... + 764959.

It is an arithmetic number, because the mean of its divisors is an integer number (2294865).

Almost surely, 2^7649545 is an apocalyptic number.

It is an amenable number.

7649545 is a deficient number, since it is larger than the sum of its proper divisors (1529915).

7649545 is a wasteful number, since it uses less digits than its factorization.

7649545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529914.

The product of its digits is 151200, while the sum is 40.

The square root of 7649545 is about 2765.7810831662. The cubic root of 7649545 is about 197.0358270964.

The spelling of 7649545 in words is "seven million, six hundred forty-nine thousand, five hundred forty-five".