7145253 has 20 divisors (see below), whose sum is σ = 11303820. Its totient is φ = 4482432.

The previous prime is 7145251. The next prime is 7145291. The reversal of 7145253 is 3525417.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5602689 + 1542564 = 2367^2 + 1242^2 .

It is not a de Polignac number, because 7145253 - 2¹ = 7145251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7145251) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 1218 + ... + 3971.

It is an arithmetic number, because the mean of its divisors is an integer number (565191).

Almost surely, 2^7145253 is an apocalyptic number.

It is an amenable number.

7145253 is a deficient number, since it is larger than the sum of its proper divisors (4158567).

7145253 is a wasteful number, since it uses less digits than its factorization.

7145253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218 (or 5209 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 7145253 is about 2673.0606053735. The cubic root of 7145253 is about 192.6072085112.

The spelling of 7145253 in words is "seven million, one hundred forty-five thousand, two hundred fifty-three".