920725 has 12 divisors (see below), whose sum is σ = 1229956. Its totient is φ = 679680.

The previous prime is 920707. The next prime is 920729. The reversal of 920725 is 527029.

920725 = 678² + 679².

It can be written as a sum of positive squares in 6 ways, for example, as 133956 + 786769 = 366^2 + 887^2 .

It is not a de Polignac number, because 920725 - 2¹¹ = 918677 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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

It is an Ulam number.

920725 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 920725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1092 + ... + 1741.

2⁹²⁰⁷²⁵ is an apocalyptic number.

920725 is the 679-th centered square number.

It is an amenable number.

920725 is a deficient number, since it is larger than the sum of its proper divisors (309231).

920725 is a wasteful number, since it uses less digits than its factorization.

920725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856 (or 2851 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 920725 is about 959.5441626106. The cubic root of 920725 is about 97.2844239899.

The spelling of 920725 in words is "nine hundred twenty thousand, seven hundred twenty-five".