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12542080 = 27519597
BaseRepresentation
bin101111110110…
…000010000000
3212121012111111
4233312002000
511202321310
61124453104
7211414555
oct57660200
925535444
1012542080
117097061
12424a194
1327a1965
141946a2c
15117b28a
hexbf6080

12542080 has 32 divisors (see below), whose sum is σ = 29984940. Its totient is φ = 5016576.

The previous prime is 12542069. The next prime is 12542083. The reversal of 12542080 is 8024521.

It can be written as a sum of positive squares in 2 ways, for example, as 12334144 + 207936 = 3512^2 + 456^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (12542083) 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, 9159 + ... + 10438.

Almost surely, 212542080 is an apocalyptic number.

12542080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12542080 is an abundant number, since it is smaller than the sum of its proper divisors (17442860).

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

12542080 is an equidigital number, since it uses as much as digits as its factorization.

12542080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19616 (or 19604 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 12542080 is about 3541.4799166450. The cubic root of 12542080 is about 232.3395740729.

The spelling of 12542080 in words is "twelve million, five hundred forty-two thousand, eighty".

Divisors: 1 2 4 5 8 10 16 20 32 40 64 80 128 160 320 640 19597 39194 78388 97985 156776 195970 313552 391940 627104 783880 1254208 1567760 2508416 3135520 6271040 12542080