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1208142 = 233131721
BaseRepresentation
bin100100110111101001110
32021101021000
410212331032
5302130032
641521130
713161165
oct4467516
92241230
101208142
11755771
124a31a6
13333ba0
142363dc
1518ce7c
hex126f4e

1208142 has 32 divisors (see below), whose sum is σ = 2892960. Its totient is φ = 371520.

The previous prime is 1208131. The next prime is 1208149. The reversal of 1208142 is 2418021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1208149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159 + ... + 1562.

It is an arithmetic number, because the mean of its divisors is an integer number (90405).

21208142 is an apocalyptic number.

1208142 is an abundant number, since it is smaller than the sum of its proper divisors (1684818).

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

1208142 is a wasteful number, since it uses less digits than its factorization.

1208142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745 (or 1739 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1208142 is about 1099.1551300886. The cubic root of 1208142 is about 106.5056533400.

The spelling of 1208142 in words is "one million, two hundred eight thousand, one hundred forty-two".

Divisors: 1 2 3 6 9 13 18 26 27 39 54 78 117 234 351 702 1721 3442 5163 10326 15489 22373 30978 44746 46467 67119 92934 134238 201357 402714 604071 1208142