1423020321 has 12 divisors (see below), whose sum is σ = 2058947748. Its totient is φ = 947076864.

The previous prime is 1423020283. The next prime is 1423020329. The reversal of 1423020321 is 1230203241.

1423020321 is a `hidden beast` number, since 1 + 42 + 302 + 0 + 321 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1137038400 + 285981921 = 33720^2 + 16911^2 .

It is not a de Polignac number, because 1423020321 - 2¹⁴ = 1423003937 is a prime.

It is a super-3 number, since 3×1423020321³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1423020294 and 1423020303.

It is not an unprimeable number, because it can be changed into a prime (1423020329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127980 + ... + 138653.

It is an arithmetic number, because the mean of its divisors is an integer number (171578979).

Almost surely, 2^1423020321 is an apocalyptic number.

It is an amenable number.

1423020321 is a deficient number, since it is larger than the sum of its proper divisors (635927427).

1423020321 is a wasteful number, since it uses less digits than its factorization.

1423020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267232 (or 267229 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1423020321 is about 37722.9415740607. The cubic root of 1423020321 is about 1124.7872047891.

Adding to 1423020321 its reverse (1230203241), we get a palindrome (2653223562).

The spelling of 1423020321 in words is "one billion, four hundred twenty-three million, twenty thousand, three hundred twenty-one".