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121543441 is a prime number
BaseRepresentation
bin1110011111010…
…01101100010001
322110201001020221
413033221230101
5222103342231
620021033041
73004050025
oct717515421
9273631227
10121543441
1162676428
1234855781
131c2475c6
14121dc385
15aa0cd11
hex73e9b11

121543441 has 2 divisors, whose sum is σ = 121543442. Its totient is φ = 121543440.

The previous prime is 121543403. The next prime is 121543453. The reversal of 121543441 is 144345121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121440400 + 103041 = 11020^2 + 321^2 .

It is an emirp because it is prime and its reverse (144345121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121543441 - 27 = 121543313 is a prime.

It is not a weakly prime, because it can be changed into another prime (121043441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60771720 + 60771721.

It is an arithmetic number, because the mean of its divisors is an integer number (60771721).

Almost surely, 2121543441 is an apocalyptic number.

It is an amenable number.

121543441 is a deficient number, since it is larger than the sum of its proper divisors (1).

121543441 is an equidigital number, since it uses as much as digits as its factorization.

121543441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

The square root of 121543441 is about 11024.6741901972. The cubic root of 121543441 is about 495.3481087046.

Adding to 121543441 its reverse (144345121), we get a palindrome (265888562).

The spelling of 121543441 in words is "one hundred twenty-one million, five hundred forty-three thousand, four hundred forty-one".