Base | Representation |
---|---|
bin | 1011011001010010001001 |
3 | 12121202121000 |
4 | 23121102021 |
5 | 1231042040 |
6 | 144005213 |
7 | 34250610 |
oct | 13312211 |
9 | 5552530 |
10 | 2987145 |
11 | 1760317 |
12 | 1000809 |
13 | 807855 |
14 | 57a877 |
15 | 3e0130 |
hex | 2d9489 |
2987145 has 64 divisors (see below), whose sum is σ = 6336000. Its totient is φ = 1306368.
The previous prime is 2987143. The next prime is 2987147. The reversal of 2987145 is 5417892.
It is an interprime number because it is at equal distance from previous prime (2987143) and next prime (2987147).
It is not a de Polignac number, because 2987145 - 21 = 2987143 is a prime.
It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2987141) by changing a digit.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27351 + ... + 27459.
It is an arithmetic number, because the mean of its divisors is an integer number (99000).
22987145 is an apocalyptic number.
It is an amenable number.
2987145 is an abundant number, since it is smaller than the sum of its proper divisors (3348855).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2987145 is a wasteful number, since it uses less digits than its factorization.
2987145 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 159 (or 153 counting only the distinct ones).
The product of its digits is 20160, while the sum is 36.
The square root of 2987145 is about 1728.3359048518. The cubic root of 2987145 is about 144.0186607761.
The spelling of 2987145 in words is "two million, nine hundred eighty-seven thousand, one hundred forty-five".
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