33120401 has 4 divisors (see below), whose sum is σ = 34863600. Its totient is φ = 31377204.

The previous prime is 33120397. The next prime is 33120419. The reversal of 33120401 is 10402133.

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: 10402133 = 7 ⋅1486019.

It is a cyclic number.

It is not a de Polignac number, because 33120401 - 2² = 33120397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33120421) 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, 871571 + ... + 871608.

It is an arithmetic number, because the mean of its divisors is an integer number (8715900).

Almost surely, 2^33120401 is an apocalyptic number.

It is an amenable number.

33120401 is a deficient number, since it is larger than the sum of its proper divisors (1743199).

33120401 is a wasteful number, since it uses less digits than its factorization.

33120401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743198.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 33120401 is about 5755.0326671532. The cubic root of 33120401 is about 321.1430507943.

Adding to 33120401 its reverse (10402133), we get a palindrome (43522534).

The spelling of 33120401 in words is "thirty-three million, one hundred twenty thousand, four hundred one".