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142860231 = 32176115307
BaseRepresentation
bin10001000001111…
…01111111000111
3100221211001101200
420200331333013
5243033011411
622101553543
73353202063
oct1040757707
9327731350
10142860231
1173706008
123ba158b3
132379c1a7
1414d8aaa3
15c81de56
hex883dfc7

142860231 has 24 divisors (see below), whose sum is σ = 222088464. Its totient is φ = 88162560.

The previous prime is 142860229. The next prime is 142860239. The reversal of 142860231 is 132068241.

142860231 is a `hidden beast` number, since 1 + 4 + 28 + 602 + 31 = 666.

It is not a de Polignac number, because 142860231 - 21 = 142860229 is a prime.

It is a super-2 number, since 2×1428602312 = 40818091202746722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142860195 and 142860204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142860239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1680 + ... + 16986.

It is an arithmetic number, because the mean of its divisors is an integer number (9253686).

Almost surely, 2142860231 is an apocalyptic number.

142860231 is a deficient number, since it is larger than the sum of its proper divisors (79228233).

142860231 is a wasteful number, since it uses less digits than its factorization.

142860231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15391 (or 15388 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 142860231 is about 11952.4152789300. The cubic root of 142860231 is about 522.7617253672.

The spelling of 142860231 in words is "one hundred forty-two million, eight hundred sixty thousand, two hundred thirty-one".