1420551 has 16 divisors (see below), whose sum is σ = 2296320. Its totient is φ = 860760.

The previous prime is 1420519. The next prime is 1420561. The reversal of 1420551 is 1550241.

It is not a de Polignac number, because 1420551 - 2⁵ = 1420519 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420501) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2095 + ... + 2688.

It is an arithmetic number, because the mean of its divisors is an integer number (143520).

2^1420551 is an apocalyptic number.

1420551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1420551 is a deficient number, since it is larger than the sum of its proper divisors (875769).

1420551 is a wasteful number, since it uses less digits than its factorization.

1420551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4803 (or 4797 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1420551 is about 1191.8687008224. The cubic root of 1420551 is about 112.4136225853.

Adding to 1420551 its reverse (1550241), we get a palindrome (2970792).

The spelling of 1420551 in words is "one million, four hundred twenty thousand, five hundred fifty-one".