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142426144 = 257290833
BaseRepresentation
bin10000111110101…
…00000000100000
3100220222222221101
420133110000200
5242430114034
622044404144
73346413400
oct1037240040
9326888841
10142426144
1173439963
123b846654
1323679733
1414cb6800
15c785514
hex87d4020

142426144 has 36 divisors (see below), whose sum is σ = 326184894. Its totient is φ = 61039104.

The previous prime is 142426129. The next prime is 142426157. The reversal of 142426144 is 441624241.

It can be written as a sum of positive squares in only one way, i.e., 112614544 + 29811600 = 10612^2 + 5460^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43849 + ... + 46984.

Almost surely, 2142426144 is an apocalyptic number.

142426144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

142426144 is an abundant number, since it is smaller than the sum of its proper divisors (183758750).

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

142426144 is an equidigital number, since it uses as much as digits as its factorization.

142426144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90857 (or 90842 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

The square root of 142426144 is about 11934.2424979552. The cubic root of 142426144 is about 522.2317101306.

The spelling of 142426144 in words is "one hundred forty-two million, four hundred twenty-six thousand, one hundred forty-four".

Divisors: 1 2 4 7 8 14 16 28 32 49 56 98 112 196 224 392 784 1568 90833 181666 363332 635831 726664 1271662 1453328 2543324 2906656 4450817 5086648 8901634 10173296 17803268 20346592 35606536 71213072 142426144