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1230442 = 21494129
BaseRepresentation
bin100101100011001101010
32022111211221
410230121222
5303333232
642212254
713313203
oct4543152
92274757
101230442
117704a4
124b408a
13341095
142405aa
15194897
hex12c66a

1230442 has 8 divisors (see below), whose sum is σ = 1858500. Its totient is φ = 610944.

The previous prime is 1230433. The next prime is 1230461. The reversal of 1230442 is 2440321.

It can be written as a sum of positive squares in 2 ways, for example, as 1185921 + 44521 = 1089^2 + 211^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767 + ... + 2362.

21230442 is an apocalyptic number.

1230442 is a deficient number, since it is larger than the sum of its proper divisors (628058).

1230442 is a wasteful number, since it uses less digits than its factorization.

1230442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1230442 is about 1109.2529017316. The cubic root of 1230442 is about 107.1569594982.

Adding to 1230442 its reverse (2440321), we get a palindrome (3670763).

The spelling of 1230442 in words is "one million, two hundred thirty thousand, four hundred forty-two".

Divisors: 1 2 149 298 4129 8258 615221 1230442