7140625 has 14 divisors (see below), whose sum is σ = 8945198. Its totient is φ = 5700000.

The previous prime is 7140611. The next prime is 7140643. The reversal of 7140625 is 5260417.

It can be written as a sum of positive squares in 7 ways, for example, as 6932689 + 207936 = 2633^2 + 456^2 .

It is not a de Polignac number, because 7140625 - 2⁹ = 7140113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

7140625 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7140625.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 15397 + ... + 15853.

Almost surely, 2^7140625 is an apocalyptic number.

It is an amenable number.

7140625 is a deficient number, since it is larger than the sum of its proper divisors (1804573).

7140625 is an frugal number, since it uses more digits than its factorization.

7140625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 7140625 is about 2672.1947908040. The cubic root of 7140625 is about 192.5656154572.

The spelling of 7140625 in words is "seven million, one hundred forty thousand, six hundred twenty-five".