7645105 has 8 divisors (see below), whose sum is σ = 9879912. Its totient is φ = 5645568.

The previous prime is 7645073. The next prime is 7645117. The reversal of 7645105 is 5015467.

It can be written as a sum of positive squares in 4 ways, for example, as 505521 + 7139584 = 711^2 + 2672^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7645105 - 2⁵ = 7645073 is a prime.

It is a super-2 number, since 2×7645105² = 116895260922050, which contains 22 as substring.

It is a Duffinian number.

7645105 is a lucky number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 58744 + ... + 58873.

It is an arithmetic number, because the mean of its divisors is an integer number (1234989).

Almost surely, 2^7645105 is an apocalyptic number.

It is an amenable number.

7645105 is a deficient number, since it is larger than the sum of its proper divisors (2234807).

7645105 is a wasteful number, since it uses less digits than its factorization.

7645105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117635.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 7645105 is about 2764.9783000957. The cubic root of 7645105 is about 196.9976981015.

It can be divided in two parts, 7645 and 105, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 7645105 in words is "seven million, six hundred forty-five thousand, one hundred five".