1426240 has 28 divisors (see below), whose sum is σ = 3396996. Its totient is φ = 570368.

The previous prime is 1426237. The next prime is 1426247. The reversal of 1426240 is 426241.

It can be written as a sum of positive squares in 2 ways, for example, as 760384 + 665856 = 872^2 + 816^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1426247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1909 + ... + 2548.

2^1426240 is an apocalyptic number.

1426240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1426240 is an abundant number, since it is smaller than the sum of its proper divisors (1970756).

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

1426240 is an equidigital number, since it uses as much as digits as its factorization.

1426240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4474 (or 4464 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1426240 is about 1194.2529045391. The cubic root of 1426240 is about 112.5634867997.

Subtracting from 1426240 its reverse (426241), we obtain a palindrome (999999).

The spelling of 1426240 in words is "one million, four hundred twenty-six thousand, two hundred forty".