3721533 has 4 divisors (see below), whose sum is σ = 4962048. Its totient is φ = 2481020.

The previous prime is 3721489. The next prime is 3721537. The reversal of 3721533 is 3351273.

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.

It is a cyclic number.

It is not a de Polignac number, because 3721533 - 2¹² = 3717437 is a prime.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721537) 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, 620253 + ... + 620258.

It is an arithmetic number, because the mean of its divisors is an integer number (1240512).

Almost surely, 2^3721533 is an apocalyptic number.

It is an amenable number.

3721533 is a deficient number, since it is larger than the sum of its proper divisors (1240515).

3721533 is a wasteful number, since it uses less digits than its factorization.

3721533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240514.

The product of its digits is 1890, while the sum is 24.

The square root of 3721533 is about 1929.1275230010. The cubic root of 3721533 is about 154.9674992557.

The spelling of 3721533 in words is "three million, seven hundred twenty-one thousand, five hundred thirty-three".