1431396 has 18 divisors (see below), whose sum is σ = 3618342. Its totient is φ = 477120.

The previous prime is 1431389. The next prime is 1431413. The reversal of 1431396 is 6931341.

It can be written as a sum of positive squares in only one way, i.e., 921600 + 509796 = 960^2 + 714^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19845 + ... + 19916.

It is an arithmetic number, because the mean of its divisors is an integer number (201019).

2^1431396 is an apocalyptic number.

It is an amenable number.

1431396 is an abundant number, since it is smaller than the sum of its proper divisors (2186946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1431396 is a wasteful number, since it uses less digits than its factorization.

1431396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39771 (or 39766 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 1431396 is about 1196.4096288479. The cubic root of 1431396 is about 112.6989664210.

Subtracting 1431396 from its reverse (6931341), we obtain a palindrome (5499945).

The spelling of 1431396 in words is "one million, four hundred thirty-one thousand, three hundred ninety-six".