1080421 has 4 divisors (see below), whose sum is σ = 1085292. Its totient is φ = 1075552.

The previous prime is 1080419. The next prime is 1080433. The reversal of 1080421 is 1240801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1240801 = 61 ⋅20341.

It can be written as a sum of positive squares in 2 ways, for example, as 245025 + 835396 = 495^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1080421 - 2¹ = 1080419 is a prime.

It is an Ulam number.

It is a Duffinian number.

1080421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1080395 and 1080404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1080451) 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, 2086 + ... + 2551.

It is an arithmetic number, because the mean of its divisors is an integer number (271323).

2^1080421 is an apocalyptic number.

It is an amenable number.

1080421 is a deficient number, since it is larger than the sum of its proper divisors (4871).

1080421 is an equidigital number, since it uses as much as digits as its factorization.

1080421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4870.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1080421 is about 1039.4330185250. The cubic root of 1080421 is about 102.6118865478.

The spelling of 1080421 in words is "one million, eighty thousand, four hundred twenty-one".