1431189 has 10 divisors (see below), whose sum is σ = 2138070. Its totient is φ = 954072.

The previous prime is 1431173. The next prime is 1431191. The reversal of 1431189 is 9811341.

It can be written as a sum of positive squares in only one way, i.e., 1034289 + 396900 = 1017^2 + 630^2 .

It is not a de Polignac number, because 1431189 - 2⁴ = 1431173 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431119) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8754 + ... + 8915.

It is an arithmetic number, because the mean of its divisors is an integer number (213807).

2^1431189 is an apocalyptic number.

It is an amenable number.

1431189 is a deficient number, since it is larger than the sum of its proper divisors (706881).

1431189 is an equidigital number, since it uses as much as digits as its factorization.

1431189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17681 (or 17672 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 1431189 is about 1196.3231168877. The cubic root of 1431189 is about 112.6935335404.

It can be divided in two parts, 14311 and 89, that added together give a square (14400 = 120²).

The spelling of 1431189 in words is "one million, four hundred thirty-one thousand, one hundred eighty-nine".