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236401 = 1121491
BaseRepresentation
bin111001101101110001
3110000021121
4321231301
530031101
65022241
72003134
oct715561
9400247
10236401
11151680
12b4981
13837a9
146221b
154a0a1
hex39b71

236401 has 4 divisors (see below), whose sum is σ = 257904. Its totient is φ = 214900.

The previous prime is 236399. The next prime is 236407. The reversal of 236401 is 104632.

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.

It is a cyclic number.

It is not a de Polignac number, because 236401 - 21 = 236399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (236407) 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 3 ways as a sum of consecutive naturals, for example, 10735 + ... + 10756.

It is an arithmetic number, because the mean of its divisors is an integer number (64476).

2236401 is an apocalyptic number.

It is an amenable number.

236401 is a deficient number, since it is larger than the sum of its proper divisors (21503).

236401 is a wasteful number, since it uses less digits than its factorization.

236401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21502.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 236401 is about 486.2108596072. The cubic root of 236401 is about 61.8324473605.

Subtracting from 236401 its reverse (104632), we obtain a square (131769 = 3632).

The spelling of 236401 in words is "two hundred thirty-six thousand, four hundred one".

Divisors: 1 11 21491 236401