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1822141 = 10118041
BaseRepresentation
bin110111100110110111101
310102120111201
412330312331
5431302031
6103015501
721326236
oct6746675
93376451
101822141
111035002
1273a591
134ba4b9
1435608d
1525ed61
hex1bcdbd

1822141 has 4 divisors (see below), whose sum is σ = 1840284. Its totient is φ = 1804000.

The previous prime is 1822123. The next prime is 1822147. The reversal of 1822141 is 1412281.

1822141 = T20 + T21 + ... + T221.

1822141 = 9542 + 9552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1412281 = 13108637.

It can be written as a sum of positive squares in 2 ways, for example, as 912025 + 910116 = 955^2 + 954^2 .

It is a cyclic number.

It is not a de Polignac number, because 1822141 - 25 = 1822109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822147) 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, 8920 + ... + 9121.

It is an arithmetic number, because the mean of its divisors is an integer number (460071).

21822141 is an apocalyptic number.

1822141 is the 955-th centered square number.

It is an amenable number.

1822141 is a deficient number, since it is larger than the sum of its proper divisors (18143).

1822141 is a wasteful number, since it uses less digits than its factorization.

1822141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18142.

The product of its digits is 128, while the sum is 19.

The square root of 1822141 is about 1349.8670304886. The cubic root of 1822141 is about 122.1407718421.

The spelling of 1822141 in words is "one million, eight hundred twenty-two thousand, one hundred forty-one".

Divisors: 1 101 18041 1822141