7125428 has 6 divisors (see below), whose sum is σ = 12469506. Its totient is φ = 3562712.

The previous prime is 7125421. The next prime is 7125463. The reversal of 7125428 is 8245217.

It can be written as a sum of positive squares in only one way, i.e., 4376464 + 2748964 = 2092^2 + 1658^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7125428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7125421) by changing a digit.

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 as a sum of consecutive naturals, namely, 890675 + ... + 890682.

It is an arithmetic number, because the mean of its divisors is an integer number (2078251).

Almost surely, 2^7125428 is an apocalyptic number.

It is an amenable number.

7125428 is a deficient number, since it is larger than the sum of its proper divisors (5344078).

7125428 is a wasteful number, since it uses less digits than its factorization.

7125428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781361 (or 1781359 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 7125428 is about 2669.3497335494. The cubic root of 7125428 is about 192.4289094890.

The spelling of 7125428 in words is "seven million, one hundred twenty-five thousand, four hundred twenty-eight".