1420553 has 4 divisors (see below), whose sum is σ = 1431060. Its totient is φ = 1410048.

The previous prime is 1420519. The next prime is 1420561. The reversal of 1420553 is 3550241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3550241 = 157 ⋅22613.

It can be written as a sum of positive squares in 2 ways, for example, as 394384 + 1026169 = 628^2 + 1013^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1420553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420583) 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, 5048 + ... + 5321.

It is an arithmetic number, because the mean of its divisors is an integer number (357765).

2^1420553 is an apocalyptic number.

It is an amenable number.

1420553 is a deficient number, since it is larger than the sum of its proper divisors (10507).

1420553 is a wasteful number, since it uses less digits than its factorization.

1420553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10506.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1420553 is about 1191.8695398407. The cubic root of 1420553 is about 112.4136753412.

Adding to 1420553 its reverse (3550241), we get a palindrome (4970794).

The spelling of 1420553 in words is "one million, four hundred twenty thousand, five hundred fifty-three".