1431240 has 32 divisors (see below), whose sum is σ = 4294080. Its totient is φ = 381632.

The previous prime is 1431223. The next prime is 1431253. The reversal of 1431240 is 421341.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5844 + ... + 6083.

It is an arithmetic number, because the mean of its divisors is an integer number (134190).

2^1431240 is an apocalyptic number.

1431240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1431240 is an abundant number, since it is smaller than the sum of its proper divisors (2862840).

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

1431240 is a wasteful number, since it uses less digits than its factorization.

1431240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11941 (or 11937 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1431240 is about 1196.3444320094. The cubic root of 1431240 is about 112.6948721248.

Adding to 1431240 its reverse (421341), we get a palindrome (1852581).

The spelling of 1431240 in words is "one million, four hundred thirty-one thousand, two hundred forty".