1431145 has 16 divisors (see below), whose sum is σ = 1846800. Its totient is φ = 1060864.

The previous prime is 1431139. The next prime is 1431149. The reversal of 1431145 is 5411341.

It can be written as a sum of positive squares in 8 ways, for example, as 290521 + 1140624 = 539^2 + 1068^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431145 - 2⁵ = 1431113 is a prime.

It is a super-2 number, since 2×1431145² = 4096352022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1431149) 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, 9531 + ... + 9679.

It is an arithmetic number, because the mean of its divisors is an integer number (115425).

2^1431145 is an apocalyptic number.

It is an amenable number.

1431145 is a deficient number, since it is larger than the sum of its proper divisors (415655).

1431145 is a wasteful number, since it uses less digits than its factorization.

1431145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284.

The product of its digits is 240, while the sum is 19.

The square root of 1431145 is about 1196.3047270658. The cubic root of 1431145 is about 112.6923786577.

Adding to 1431145 its reverse (5411341), we get a palindrome (6842486).

The spelling of 1431145 in words is "one million, four hundred thirty-one thousand, one hundred forty-five".