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11401 = 13877
BaseRepresentation
bin10110010001001
3120122021
42302021
5331101
6124441
745145
oct26211
916567
1011401
118625
126721
135260
144225
1535a1
hex2c89

11401 has 4 divisors (see below), whose sum is σ = 12292. Its totient is φ = 10512.

The previous prime is 11399. The next prime is 11411. The reversal of 11401 is 10411.

Adding to 11401 its reverse (10411), we get a palindrome (21812).

Subtracting from 11401 its reverse (10411), we obtain a triangular number (990 = T44).

11401 = 752 + 762.

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: 10411 = 29359.

It can be written as a sum of positive squares in 2 ways, for example, as 5625 + 5776 = 75^2 + 76^2 .

It is a cyclic number.

It is not a de Polignac number, because 11401 - 21 = 11399 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 (11411) 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, 426 + ... + 451.

It is an arithmetic number, because the mean of its divisors is an integer number (3073).

211401 is an apocalyptic number.

11401 is the 76-th centered square number.

It is an amenable number.

11401 is a deficient number, since it is larger than the sum of its proper divisors (891).

11401 is an equidigital number, since it uses as much as digits as its factorization.

11401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 11401 is about 106.7754653467. The cubic root of 11401 is about 22.5068292027.

The spelling of 11401 in words is "eleven thousand, four hundred one", and thus it is an iban number.

Divisors: 1 13 877 11401