33087421 has 4 divisors (see below), whose sum is σ = 33325600. Its totient is φ = 32849244.

The previous prime is 33087419. The next prime is 33087433. The reversal of 33087421 is 12478033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12478033 = 29 ⋅430277.

It is a cyclic number.

It is not a de Polignac number, because 33087421 - 2¹ = 33087419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33087421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33087401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118881 + ... + 119158.

It is an arithmetic number, because the mean of its divisors is an integer number (8331400).

Almost surely, 2^33087421 is an apocalyptic number.

It is an amenable number.

33087421 is a deficient number, since it is larger than the sum of its proper divisors (238179).

33087421 is a wasteful number, since it uses less digits than its factorization.

33087421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238178.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 33087421 is about 5752.1666352775. The cubic root of 33087421 is about 321.0364214973.

The spelling of 33087421 in words is "thirty-three million, eighty-seven thousand, four hundred twenty-one".