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1219201 = 5772113
BaseRepresentation
bin100101001101010000001
32021221102121
410221222001
5303003301
642044241
713235344
oct4515201
92257377
101219201
11763005
124a9681
13338c29
1423a45b
151913a1
hex129a81

1219201 has 4 divisors (see below), whose sum is σ = 1221892. Its totient is φ = 1216512.

The previous prime is 1219177. The next prime is 1219213. The reversal of 1219201 is 1029121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1029121 = 3832687.

It can be written as a sum of positive squares in 2 ways, for example, as 577600 + 641601 = 760^2 + 801^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1219201 is a prime.

It is a Duffinian number.

1219201 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1219241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480 + ... + 1633.

It is an arithmetic number, because the mean of its divisors is an integer number (305473).

21219201 is an apocalyptic number.

It is an amenable number.

1219201 is a deficient number, since it is larger than the sum of its proper divisors (2691).

1219201 is an equidigital number, since it uses as much as digits as its factorization.

1219201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1219201 is about 1104.1743521745. The cubic root of 1219201 is about 106.8296412744.

The spelling of 1219201 in words is "one million, two hundred nineteen thousand, two hundred one".

Divisors: 1 577 2113 1219201