1145421 has 20 divisors (see below), whose sum is σ = 1742400. Its totient is φ = 749736.

The previous prime is 1145411. The next prime is 1145429. The reversal of 1145421 is 1245411.

It is not a de Polignac number, because 1145421 - 2⁷ = 1145293 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1145394 and 1145403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145429) 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 19 ways as a sum of consecutive naturals, for example, 6310 + ... + 6488.

It is an arithmetic number, because the mean of its divisors is an integer number (87120).

2^1145421 is an apocalyptic number.

It is an amenable number.

1145421 is a deficient number, since it is larger than the sum of its proper divisors (596979).

1145421 is an equidigital number, since it uses as much as digits as its factorization.

1145421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 261 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 1145421 is about 1070.2434302531. The cubic root of 1145421 is about 104.6297161323.

The spelling of 1145421 in words is "one million, one hundred forty-five thousand, four hundred twenty-one".