1431345 has 16 divisors (see below), whose sum is σ = 2352960. Its totient is φ = 742464.

The previous prime is 1431337. The next prime is 1431347. The reversal of 1431345 is 5431341.

It is not a de Polignac number, because 1431345 - 2³ = 1431337 is a prime.

1431345 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1431347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 735 + ... + 1844.

It is an arithmetic number, because the mean of its divisors is an integer number (147060).

2^1431345 is an apocalyptic number.

1431345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1431345 is a deficient number, since it is larger than the sum of its proper divisors (921615).

1431345 is a wasteful number, since it uses less digits than its factorization.

1431345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624.

The product of its digits is 720, while the sum is 21.

The square root of 1431345 is about 1196.3883148878. The cubic root of 1431345 is about 112.6976279338.

Adding to 1431345 its reverse (5431341), we get a palindrome (6862686).

The spelling of 1431345 in words is "one million, four hundred thirty-one thousand, three hundred forty-five".