1333828421 has 4 divisors (see below), whose sum is σ = 1333964844. Its totient is φ = 1333692000.

The previous prime is 1333828417. The next prime is 1333828453. The reversal of 1333828421 is 1248283331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1248283331 = 9721 ⋅128411.

It can be written as a sum of positive squares in 2 ways, for example, as 807355396 + 526473025 = 28414^2 + 22945^2 .

It is a cyclic number.

It is not a de Polignac number, because 1333828421 - 2² = 1333828417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1333828471) 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, 52310 + ... + 73511.

It is an arithmetic number, because the mean of its divisors is an integer number (333491211).

Almost surely, 2^1333828421 is an apocalyptic number.

It is an amenable number.

1333828421 is a deficient number, since it is larger than the sum of its proper divisors (136423).

1333828421 is a wasteful number, since it uses less digits than its factorization.

1333828421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136422.

The product of its digits is 27648, while the sum is 35.

The square root of 1333828421 is about 36521.6158048901. The cubic root of 1333828421 is about 1100.7786280618.

The spelling of 1333828421 in words is "one billion, three hundred thirty-three million, eight hundred twenty-eight thousand, four hundred twenty-one".