7755145 has 8 divisors (see below), whose sum is σ = 9853704. Its totient is φ = 5839104.

The previous prime is 7755133. The next prime is 7755149. The reversal of 7755145 is 5415577.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 242064 + 7513081 = 492^2 + 2741^2 .

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 7755145 - 2⁷ = 7755017 is a prime.

It is an Ulam number.

It is a Duffinian number.

7755145 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7755145.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7755149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45534 + ... + 45703.

It is an arithmetic number, because the mean of its divisors is an integer number (1231713).

Almost surely, 2^7755145 is an apocalyptic number.

It is an amenable number.

7755145 is a deficient number, since it is larger than the sum of its proper divisors (2098559).

7755145 is a wasteful number, since it uses less digits than its factorization.

7755145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91259.

The product of its digits is 24500, while the sum is 34.

The square root of 7755145 is about 2784.8060973791. The cubic root of 7755145 is about 197.9383629524.

The spelling of 7755145 in words is "seven million, seven hundred fifty-five thousand, one hundred forty-five".