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6801925 = 521320929
BaseRepresentation
bin11001111100101000000101
3110210120111011
4121330220011
53220130200
6401442221
7111546454
oct31745005
913716434
106801925
113926429
122340371
131542010
14c90b9b
158e55ba
hex67ca05

6801925 has 12 divisors (see below), whose sum is σ = 9083620. Its totient is φ = 5022720.

The previous prime is 6801923. The next prime is 6801937. The reversal of 6801925 is 5291086.

6801925 = T571 + T572 + ... + T609.

It can be written as a sum of positive squares in 6 ways, for example, as 641601 + 6160324 = 801^2 + 2482^2 .

It is not a de Polignac number, because 6801925 - 21 = 6801923 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

6801925 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6801923) 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, 10140 + ... + 10789.

Almost surely, 26801925 is an apocalyptic number.

6801925 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6801925 is a deficient number, since it is larger than the sum of its proper divisors (2281695).

6801925 is a wasteful number, since it uses less digits than its factorization.

6801925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20952 (or 20947 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 6801925 is about 2608.0500378635. The cubic root of 6801925 is about 189.4715231167.

The spelling of 6801925 in words is "six million, eight hundred one thousand, nine hundred twenty-five".

Divisors: 1 5 13 25 65 325 20929 104645 272077 523225 1360385 6801925