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125680 = 2451571
BaseRepresentation
bin11110101011110000
320101101211
4132223300
513010210
62405504
71032262
oct365360
9211354
10125680
1186475
1260894
1345289
1433b32
152738a
hex1eaf0

125680 has 20 divisors (see below), whose sum is σ = 292392. Its totient is φ = 50240.

The previous prime is 125669. The next prime is 125683. The reversal of 125680 is 86521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706 + ... + 865.

2125680 is an apocalyptic number.

125680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125680 is an abundant number, since it is smaller than the sum of its proper divisors (166712).

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

125680 is a wasteful number, since it uses less digits than its factorization.

125680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 125680 is about 354.5137514963. The cubic root of 125680 is about 50.0905027529.

The spelling of 125680 in words is "one hundred twenty-five thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 40 80 1571 3142 6284 7855 12568 15710 25136 31420 62840 125680