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1220008 = 23152501
BaseRepresentation
bin100101001110110101000
32021222112111
410221312220
5303020013
642052104
713240606
oct4516650
92258474
101220008
11763679
124aa034
133393ca
1423a876
1519173d
hex129da8

1220008 has 8 divisors (see below), whose sum is σ = 2287530. Its totient is φ = 610000.

The previous prime is 1219991. The next prime is 1220027. The reversal of 1220008 is 8000221.

It can be written as a sum of positive squares in only one way, i.e., 1170724 + 49284 = 1082^2 + 222^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1220008.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76243 + ... + 76258.

21220008 is an apocalyptic number.

It is an amenable number.

1220008 is a deficient number, since it is larger than the sum of its proper divisors (1067522).

1220008 is a wasteful number, since it uses less digits than its factorization.

1220008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152507 (or 152503 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1220008 is about 1104.5397231426. The cubic root of 1220008 is about 106.8532065728.

Adding to 1220008 its reverse (8000221), we get a palindrome (9220229).

The spelling of 1220008 in words is "one million, two hundred twenty thousand, eight".

Divisors: 1 2 4 8 152501 305002 610004 1220008