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12580869 = 371931531
BaseRepresentation
bin101111111111…
…100000000101
3212200011201010
4233333200011
511210041434
61125352433
7211635630
oct57774005
925604633
1012580869
117113214
124268719
1327b6502
141956c17
1511879e9
hexbff805

12580869 has 16 divisors (see below), whose sum is σ = 20180480. Its totient is φ = 6810480.

The previous prime is 12580859. The next prime is 12580871. The reversal of 12580869 is 96808521.

It is not a de Polignac number, because 12580869 - 25 = 12580837 is a prime.

It is a super-2 number, since 2×125808692 = 316556529590322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12580859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15367 + ... + 16164.

It is an arithmetic number, because the mean of its divisors is an integer number (1261280).

Almost surely, 212580869 is an apocalyptic number.

12580869 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12580869 is a deficient number, since it is larger than the sum of its proper divisors (7599611).

12580869 is a wasteful number, since it uses less digits than its factorization.

12580869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31560.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 12580869 is about 3546.9520718499. The cubic root of 12580869 is about 232.5788471160.

The spelling of 12580869 in words is "twelve million, five hundred eighty thousand, eight hundred sixty-nine".

Divisors: 1 3 7 19 21 57 133 399 31531 94593 220717 599089 662151 1797267 4193623 12580869