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254142385 = 5719461829
BaseRepresentation
bin11110010010111…
…10011110110001
3122201012202210221
433021132132301
51010030024020
641115053041
76204113620
oct1711363661
9581182727
10254142385
11120502a32
1271141181
1340863013
1425a776b7
15174a16aa
hexf25e7b1

254142385 has 32 divisors (see below), whose sum is σ = 368121600. Its totient is φ = 164540160.

The previous prime is 254142373. The next prime is 254142389. The reversal of 254142385 is 583241452.

It is not a de Polignac number, because 254142385 - 27 = 254142257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 254142385.

It is not an unprimeable number, because it can be changed into a prime (254142389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306151 + ... + 306979.

It is an arithmetic number, because the mean of its divisors is an integer number (11503800).

Almost surely, 2254142385 is an apocalyptic number.

It is an amenable number.

254142385 is a deficient number, since it is larger than the sum of its proper divisors (113979215).

254142385 is a wasteful number, since it uses less digits than its factorization.

254142385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321.

The product of its digits is 38400, while the sum is 34.

The square root of 254142385 is about 15941.8438394058. The cubic root of 254142385 is about 633.4208680180.

The spelling of 254142385 in words is "two hundred fifty-four million, one hundred forty-two thousand, three hundred eighty-five".

Divisors: 1 5 7 19 35 95 133 461 665 829 2305 3227 4145 5803 8759 15751 16135 29015 43795 61313 78755 110257 306565 382169 551285 1910845 2675183 7261211 13375915 36306055 50828477 254142385