7021825 has 12 divisors (see below), whose sum is σ = 8767420. Its totient is φ = 5578560.

The previous prime is 7021789. The next prime is 7021843. The reversal of 7021825 is 5281207.

It can be written as a sum of positive squares in 6 ways, for example, as 4624 + 7017201 = 68^2 + 2649^2 .

It is not a de Polignac number, because 7021825 - 2¹¹ = 7019777 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 7021825.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3031 + ... + 4819.

Almost surely, 2^7021825 is an apocalyptic number.

It is an amenable number.

7021825 is a deficient number, since it is larger than the sum of its proper divisors (1745595).

7021825 is a wasteful number, since it uses less digits than its factorization.

7021825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956 (or 1951 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 7021825 is about 2649.8726384489. The cubic root of 7021825 is about 191.4917202209.

The spelling of 7021825 in words is "seven million, twenty-one thousand, eight hundred twenty-five".