431261 has 8 divisors (see below), whose sum is σ = 449280. Its totient is φ = 413712.

The previous prime is 431257. The next prime is 431267. The reversal of 431261 is 162134.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 431261 - 2² = 431257 is a prime.

It is a super-4 number, since 4×431261⁴ (a number of 24 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4136 + ... + 4238.

It is an arithmetic number, because the mean of its divisors is an integer number (56160).

2⁴³¹²⁶¹ is an apocalyptic number.

It is an amenable number.

431261 is a deficient number, since it is larger than the sum of its proper divisors (18019).

431261 is a wasteful number, since it uses less digits than its factorization.

431261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235.

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

The square root of 431261 is about 656.7046520316. The cubic root of 431261 is about 75.5521327586.

Adding to 431261 its reverse (162134), we get a palindrome (593395).

The spelling of 431261 in words is "four hundred thirty-one thousand, two hundred sixty-one".