33735421 has 4 divisors (see below), whose sum is σ = 33875644. Its totient is φ = 33595200.

The previous prime is 33735413. The next prime is 33735451. The reversal of 33735421 is 12453733.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12453733 = 97 ⋅128389.

It can be written as a sum of positive squares in 2 ways, for example, as 9084196 + 24651225 = 3014^2 + 4965^2 .

It is a cyclic number.

It is not a de Polignac number, because 33735421 - 2³ = 33735413 is a prime.

It is a super-2 number, since 2×33735421² = 2276157260094482, which contains 22 as substring.

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 33735421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33735451) 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, 69750 + ... + 70231.

It is an arithmetic number, because the mean of its divisors is an integer number (8468911).

Almost surely, 2^33735421 is an apocalyptic number.

It is an amenable number.

33735421 is a deficient number, since it is larger than the sum of its proper divisors (140223).

33735421 is a wasteful number, since it uses less digits than its factorization.

33735421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140222.

The product of its digits is 7560, while the sum is 28.

The square root of 33735421 is about 5808.2201232391. The cubic root of 33735421 is about 323.1186642054.

The spelling of 33735421 in words is "thirty-three million, seven hundred thirty-five thousand, four hundred twenty-one".