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2561104 = 247131759
BaseRepresentation
bin1001110001010001010000
311211010011201
421301101100
51123423404
6130520544
730524530
oct11612120
94733151
102561104
11149a217
12a36154
136b8960
144a94c0
15358ca4
hex271450

2561104 has 40 divisors (see below), whose sum is σ = 6110720. Its totient is φ = 1012608.

The previous prime is 2561099. The next prime is 2561129. The reversal of 2561104 is 4011652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 577 + ... + 2335.

It is an arithmetic number, because the mean of its divisors is an integer number (152768).

22561104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2561104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3055360).

2561104 is an abundant number, since it is smaller than the sum of its proper divisors (3549616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2561104 is a wasteful number, since it uses less digits than its factorization.

2561104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787 (or 1781 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2561104 is about 1600.3449628127. The cubic root of 2561104 is about 136.8177376314.

Adding to 2561104 its reverse (4011652), we get a palindrome (6572756).

The spelling of 2561104 in words is "two million, five hundred sixty-one thousand, one hundred four".

Divisors: 1 2 4 7 8 13 14 16 26 28 52 56 91 104 112 182 208 364 728 1456 1759 3518 7036 12313 14072 22867 24626 28144 45734 49252 91468 98504 160069 182936 197008 320138 365872 640276 1280552 2561104