1420540 has 36 divisors (see below), whose sum is σ = 3284568. Its totient is φ = 515680.

The previous prime is 1420519. The next prime is 1420561. The reversal of 1420540 is 450241.

It is an interprime number because it is at equal distance from previous prime (1420519) and next prime (1420561).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2127 + ... + 2713.

It is an arithmetic number, because the mean of its divisors is an integer number (91238).

2^1420540 is an apocalyptic number.

1420540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1420540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1642284).

1420540 is an abundant number, since it is smaller than the sum of its proper divisors (1864028).

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

1420540 is a wasteful number, since it uses less digits than its factorization.

1420540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1420540 is about 1191.8640862112. The cubic root of 1420540 is about 112.4133324273.

Adding to 1420540 its reverse (450241), we get a palindrome (1870781).

Subtracting from 1420540 its reverse (450241), we obtain a cube (970299 = 99³).

The spelling of 1420540 in words is "one million, four hundred twenty thousand, five hundred forty".