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1228142 = 2614071
BaseRepresentation
bin100101011110101101110
32022101200202
410223311232
5303300032
642153502
713303406
oct4536556
92271622
101228142
117697a3
124b2892
13340016
1423d806
15193d62
hex12bd6e

1228142 has 4 divisors (see below), whose sum is σ = 1842216. Its totient is φ = 614070.

The previous prime is 1228133. The next prime is 1228147. The reversal of 1228142 is 2418221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307034 + ... + 307037.

It is an arithmetic number, because the mean of its divisors is an integer number (460554).

21228142 is an apocalyptic number.

1228142 is a deficient number, since it is larger than the sum of its proper divisors (614074).

1228142 is an equidigital number, since it uses as much as digits as its factorization.

1228142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614073.

The product of its digits is 256, while the sum is 20.

The square root of 1228142 is about 1108.2156829787. The cubic root of 1228142 is about 107.0901502454.

The spelling of 1228142 in words is "one million, two hundred twenty-eight thousand, one hundred forty-two".

Divisors: 1 2 614071 1228142