7640545 has 24 divisors (see below), whose sum is σ = 10275048. Its totient is φ = 5448960.

The previous prime is 7640519. The next prime is 7640579. The reversal of 7640545 is 5450467.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2405601 + 5234944 = 1551^2 + 2288^2 .

It is not a de Polignac number, because 7640545 - 2¹¹ = 7638497 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44079 + ... + 44251.

It is an arithmetic number, because the mean of its divisors is an integer number (428127).

Almost surely, 2^7640545 is an apocalyptic number.

It is an amenable number.

7640545 is a deficient number, since it is larger than the sum of its proper divisors (2634503).

7640545 is a wasteful number, since it uses less digits than its factorization.

7640545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 7640545 is about 2764.1535774989. The cubic root of 7640545 is about 196.9585232237.

The spelling of 7640545 in words is "seven million, six hundred forty thousand, five hundred forty-five".