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431401 = 3891109
BaseRepresentation
bin1101001010100101001
3210220202211
41221110221
5102301101
613125121
73444505
oct1512451
9726684
10431401
11275133
121897a1
13121489
14b3305
1587c51
hex69529

431401 has 4 divisors (see below), whose sum is σ = 432900. Its totient is φ = 429904.

The previous prime is 431399. The next prime is 431423. The reversal of 431401 is 104134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104134 = 252067.

It can be written as a sum of positive squares in 2 ways, for example, as 42025 + 389376 = 205^2 + 624^2 .

It is a cyclic number.

It is not a de Polignac number, because 431401 - 21 = 431399 is a prime.

It is a super-2 number, since 2×4314012 = 372213645602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431441) 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, 166 + ... + 943.

It is an arithmetic number, because the mean of its divisors is an integer number (108225).

2431401 is an apocalyptic number.

It is an amenable number.

431401 is a deficient number, since it is larger than the sum of its proper divisors (1499).

431401 is a wasteful number, since it uses less digits than its factorization.

431401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 431401 is about 656.8112362011. The cubic root of 431401 is about 75.5603073553.

Adding to 431401 its reverse (104134), we get a palindrome (535535).

It can be divided in two parts, 43 and 1401, that added together give a square (1444 = 382).

The spelling of 431401 in words is "four hundred thirty-one thousand, four hundred one".

Divisors: 1 389 1109 431401