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1220404 = 22305101
BaseRepresentation
bin100101001111100110100
32022000002011
410221330310
5303023104
642054004
713242013
oct4517464
92260064
101220404
117639a9
124aa304
13339643
1423aa7a
15191904
hex129f34

1220404 has 6 divisors (see below), whose sum is σ = 2135714. Its totient is φ = 610200.

The previous prime is 1220393. The next prime is 1220411. The reversal of 1220404 is 4040221.

It can be written as a sum of positive squares in only one way, i.e., 1210000 + 10404 = 1100^2 + 102^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152547 + ... + 152554.

21220404 is an apocalyptic number.

It is an amenable number.

1220404 is a deficient number, since it is larger than the sum of its proper divisors (915310).

1220404 is a wasteful number, since it uses less digits than its factorization.

1220404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305105 (or 305103 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 1220404 is about 1104.7189687880. The cubic root of 1220404 is about 106.8647664130.

Adding to 1220404 its reverse (4040221), we get a palindrome (5260625).

The spelling of 1220404 in words is "one million, two hundred twenty thousand, four hundred four".

Divisors: 1 2 4 305101 610202 1220404