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1015625 = 5713
BaseRepresentation
bin11110111111101001001
31220121011202
43313331021
5230000000
633433545
711430002
oct3677511
91817152
101015625
11634066
1240b8b5
13297380
141c61a9
15150dd5
hexf7f49

1015625 has 16 divisors (see below), whose sum is σ = 1367184. Its totient is φ = 750000.

The previous prime is 1015603. The next prime is 1015627. The reversal of 1015625 is 5265101.

1015625 = 1852 + 1862 + ... + 2102.

It can be written as a sum of positive squares in 8 ways, for example, as 602176 + 413449 = 776^2 + 643^2 .

It is not a de Polignac number, because 1015625 - 26 = 1015561 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1015597 and 1015606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1015627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78119 + ... + 78131.

It is an arithmetic number, because the mean of its divisors is an integer number (85449).

21015625 is an apocalyptic number.

It is an amenable number.

1015625 is a deficient number, since it is larger than the sum of its proper divisors (351559).

1015625 is an frugal number, since it uses more digits than its factorization.

1015625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1015625 is about 1007.7822185373. The cubic root of 1015625 is about 100.5181439647.

The spelling of 1015625 in words is "one million, fifteen thousand, six hundred twenty-five".

Divisors: 1 5 13 25 65 125 325 625 1625 3125 8125 15625 40625 78125 203125 1015625