1000431 has 24 divisors (see below), whose sum is σ = 1572480. Its totient is φ = 634392.

The previous prime is 1000429. The next prime is 1000453. The reversal of 1000431 is 1340001.

It is not a de Polignac number, because 1000431 - 2¹ = 1000429 is a prime.

It is a super-2 number, since 2×1000431² = 2001724371522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

1000431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5500 + ... + 5678.

It is an arithmetic number, because the mean of its divisors is an integer number (65520).

2^1000431 is an apocalyptic number.

1000431 is a deficient number, since it is larger than the sum of its proper divisors (572049).

1000431 is an equidigital number, since it uses as much as digits as its factorization.

1000431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1000431 is about 1000.2154767849. The cubic root of 1000431 is about 100.0143646031.

Adding to 1000431 its reverse (1340001), we get a palindrome (2340432).

It can be divided in two parts, 1000 and 431, that added together give a triangular number (1431 = T₅₃).

The spelling of 1000431 in words is "one million, four hundred thirty-one", and thus it is an aban number.