Search a number
-
+
121420313 = 717345759
BaseRepresentation
bin1110011110010…
…11101000011001
322110110210100122
413033023220121
5222040422223
620014243025
73003025040
oct717135031
9273423318
10121420313
11625a1973
12347b6475
131c203551
14121a9557
15a9d65c8
hex73cba19

121420313 has 4 divisors (see below), whose sum is σ = 138766080. Its totient is φ = 104074548.

The previous prime is 121420291. The next prime is 121420331. The reversal of 121420313 is 313024121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 313024121 = 439713039.

It is a cyclic number.

It is not a de Polignac number, because 121420313 - 214 = 121403929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121420291 and 121420300.

It is not an unprimeable number, because it can be changed into a prime (121420333) 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, 8672873 + ... + 8672886.

It is an arithmetic number, because the mean of its divisors is an integer number (34691520).

Almost surely, 2121420313 is an apocalyptic number.

It is an amenable number.

121420313 is a deficient number, since it is larger than the sum of its proper divisors (17345767).

121420313 is an equidigital number, since it uses as much as digits as its factorization.

121420313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17345766.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 121420313 is about 11019.0885739248. The cubic root of 121420313 is about 495.1807835395.

Adding to 121420313 its reverse (313024121), we get a palindrome (434444434).

The spelling of 121420313 in words is "one hundred twenty-one million, four hundred twenty thousand, three hundred thirteen".

Divisors: 1 7 17345759 121420313