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990725 = 52231723
BaseRepresentation
bin11110001111000000101
31212100000112
43301320011
5223200400
633122405
711264261
oct3617005
91770015
10990725
1161738a
123b9405
13288c38
141bb0a1
15148835
hexf1e05

990725 has 12 divisors (see below), whose sum is σ = 1282656. Its totient is φ = 757680.

The previous prime is 990719. The next prime is 990733. The reversal of 990725 is 527099.

Adding to 990725 its reverse (527099), we get a square (1517824 = 12322).

990725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 990725 - 28 = 990469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 990691 and 990700.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990725.

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, 287 + ... + 1436.

It is an arithmetic number, because the mean of its divisors is an integer number (106888).

2990725 is an apocalyptic number.

990725 is the 575-th octagonal number.

It is an amenable number.

990725 is a deficient number, since it is larger than the sum of its proper divisors (291931).

990725 is a wasteful number, since it uses less digits than its factorization.

990725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756 (or 1751 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 990725 is about 995.3516966379. The cubic root of 990725 is about 99.6898725372.

The spelling of 990725 in words is "nine hundred ninety thousand, seven hundred twenty-five".