[go: up one dir, main page]

Search a number
-
+
75780001 = 1122712311
BaseRepresentation
bin1001000010001…
…00111110100001
312021121000121201
410201010332201
5123344430001
611304121201
71610055643
oct441047641
9167530551
1075780001
1139859700
1221466201
131291364b
14a0c8893
1569bd501
hex4844fa1

75780001 has 12 divisors (see below), whose sum is σ = 83638912. Its totient is φ = 68607000.

The previous prime is 75779981. The next prime is 75780007. The reversal of 75780001 is 10008757.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2k-75780001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75780007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31636 + ... + 33946.

Almost surely, 275780001 is an apocalyptic number.

It is an amenable number.

75780001 is a deficient number, since it is larger than the sum of its proper divisors (7858911).

75780001 is a wasteful number, since it uses less digits than its factorization.

75780001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604 (or 2593 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 75780001 is about 8705.1709345653. The cubic root of 75780001 is about 423.1732454531.

Adding to 75780001 its reverse (10008757), we get a palindrome (85788758).

The spelling of 75780001 in words is "seventy-five million, seven hundred eighty thousand, one".

Divisors: 1 11 121 271 2311 2981 25421 32791 279631 626281 6889091 75780001