431487 has 20 divisors (see below), whose sum is σ = 737616. Its totient is φ = 246240.

The previous prime is 431479. The next prime is 431513. The reversal of 431487 is 784134.

It is not a de Polignac number, because 431487 - 2³ = 431479 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

431487 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 431487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 187 + ... + 947.

2⁴³¹⁴⁸⁷ is an apocalyptic number.

431487 is a deficient number, since it is larger than the sum of its proper divisors (306129).

431487 is an equidigital number, since it uses as much as digits as its factorization.

431487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 771 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 431487 is about 656.8767007590. The cubic root of 431487 is about 75.5653280164.

The spelling of 431487 in words is "four hundred thirty-one thousand, four hundred eighty-seven".