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1215201 = 31331159
BaseRepresentation
bin100101000101011100001
32021201221110
410220223201
5302341301
642013533
713220601
oct4505341
92251843
101215201
1175aaa9
124a72a9
13337170
14238c01
151900d6
hex128ae1

1215201 has 8 divisors (see below), whose sum is σ = 1744960. Its totient is φ = 747792.

The previous prime is 1215197. The next prime is 1215209. The reversal of 1215201 is 1025121.

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

It is not a de Polignac number, because 1215201 - 22 = 1215197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15541 + ... + 15618.

It is an arithmetic number, because the mean of its divisors is an integer number (218120).

21215201 is an apocalyptic number.

It is an amenable number.

1215201 is a deficient number, since it is larger than the sum of its proper divisors (529759).

1215201 is a wasteful number, since it uses less digits than its factorization.

1215201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31175.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1215201 is about 1102.3615559334. The cubic root of 1215201 is about 106.7126830535.

The spelling of 1215201 in words is "one million, two hundred fifteen thousand, two hundred one".

Divisors: 1 3 13 39 31159 93477 405067 1215201