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1242205 = 5248441
BaseRepresentation
bin100101111010001011101
32100002222121
410233101131
5304222310
642342541
713362406
oct4572135
92302877
101242205
11779318
124baa51
13346543
142449ad
151980da
hex12f45d

1242205 has 4 divisors (see below), whose sum is σ = 1490652. Its totient is φ = 993760.

The previous prime is 1242193. The next prime is 1242217. The reversal of 1242205 is 5022421.

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

It is an interprime number because it is at equal distance from previous prime (1242193) and next prime (1242217).

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 1006009 = 486^2 + 1003^2 .

It is not a de Polignac number, because 1242205 - 215 = 1209437 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

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, 124216 + ... + 124225.

It is an arithmetic number, because the mean of its divisors is an integer number (372663).

21242205 is an apocalyptic number.

It is an amenable number.

1242205 is a deficient number, since it is larger than the sum of its proper divisors (248447).

1242205 is an equidigital number, since it uses as much as digits as its factorization.

1242205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248446.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1242205 is about 1114.5425070404. The cubic root of 1242205 is about 107.4973498535.

Adding to 1242205 its reverse (5022421), we get a palindrome (6264626).

The spelling of 1242205 in words is "one million, two hundred forty-two thousand, two hundred five".

Divisors: 1 5 248441 1242205