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1372825 = 5289617
BaseRepresentation
bin101001111001010011001
32120202011101
411033022121
5322412300
645231401
714445256
oct5171231
92522141
101372825
11858473
12562561
13390b2c
1427a42d
151c1b6a
hex14f299

1372825 has 12 divisors (see below), whose sum is σ = 1724220. Its totient is φ = 1084160.

The previous prime is 1372799. The next prime is 1372829. The reversal of 1372825 is 5282731.

1372825 = 8282 + 8292.

It can be written as a sum of positive squares in 6 ways, for example, as 456976 + 915849 = 676^2 + 957^2 .

It is not a de Polignac number, because 1372825 - 213 = 1364633 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1372793 and 1372802.

It is not an unprimeable number, because it can be changed into a prime (1372829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1917 + ... + 2533.

It is an arithmetic number, because the mean of its divisors is an integer number (143685).

21372825 is an apocalyptic number.

1372825 is the 829-th centered square number.

It is an amenable number.

1372825 is a deficient number, since it is larger than the sum of its proper divisors (351395).

1372825 is an equidigital number, since it uses as much as digits as its factorization.

1372825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716 (or 711 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 1372825 is about 1171.6761497957. The cubic root of 1372825 is about 111.1403413837.

It can be divided in two parts, 1372 and 825, that added together give a cube (2197 = 133).

The spelling of 1372825 in words is "one million, three hundred seventy-two thousand, eight hundred twenty-five".

Divisors: 1 5 25 89 445 617 2225 3085 15425 54913 274565 1372825