1431109 has 4 divisors (see below), whose sum is σ = 1433740. Its totient is φ = 1428480.

The previous prime is 1431107. The next prime is 1431113. The reversal of 1431109 is 9011341.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172225 + 1258884 = 415^2 + 1122^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431109 - 2¹ = 1431107 is a prime.

It is a Duffinian number.

1431109 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431107) 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, 162 + ... + 1699.

It is an arithmetic number, because the mean of its divisors is an integer number (358435).

2^1431109 is an apocalyptic number.

It is an amenable number.

1431109 is a deficient number, since it is larger than the sum of its proper divisors (2631).

1431109 is an equidigital number, since it uses as much as digits as its factorization.

1431109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1431109 is about 1196.2896806376. The cubic root of 1431109 is about 112.6914337360.

It can be divided in two parts, 1431 and 109, that added together give a triangular number (1540 = T₅₅).

The spelling of 1431109 in words is "one million, four hundred thirty-one thousand, one hundred nine".