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12971190 = 235432373
BaseRepresentation
bin110001011110…
…110010110110
3220102000010110
4301132302312
511310034230
61142003450
7215152611
oct61366266
926360113
1012971190
11735a4a1
124416586
1328c207b
141a19178
1512134b0
hexc5ecb6

12971190 has 16 divisors (see below), whose sum is σ = 31130928. Its totient is φ = 3458976.

The previous prime is 12971173. The next prime is 12971197. The reversal of 12971190 is 9117921.

It is a super-2 number, since 2×129711902 = 336503540032200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 432373 = 12971190 / (1 + 2 + 9 + 7 + 1 + 1 + 9 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12971197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216157 + ... + 216216.

It is an arithmetic number, because the mean of its divisors is an integer number (1945683).

Almost surely, 212971190 is an apocalyptic number.

12971190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12971190 is an abundant number, since it is smaller than the sum of its proper divisors (18159738).

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

12971190 is a wasteful number, since it uses less digits than its factorization.

12971190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432383.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 12971190 is about 3601.5538313345. The cubic root of 12971190 is about 234.9596429868.

The spelling of 12971190 in words is "twelve million, nine hundred seventy-one thousand, one hundred ninety".

Divisors: 1 2 3 5 6 10 15 30 432373 864746 1297119 2161865 2594238 4323730 6485595 12971190