3575621 has 4 divisors (see below), whose sum is σ = 4086432. Its totient is φ = 3064812.

The previous prime is 3575617. The next prime is 3575639. The reversal of 3575621 is 1265753.

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: 1265753 = 97 ⋅13049.

It is a cyclic number.

It is not a de Polignac number, because 3575621 - 2² = 3575617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3575521) 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, 255395 + ... + 255408.

It is an arithmetic number, because the mean of its divisors is an integer number (1021608).

Almost surely, 2^3575621 is an apocalyptic number.

It is an amenable number.

3575621 is a deficient number, since it is larger than the sum of its proper divisors (510811).

3575621 is an equidigital number, since it uses as much as digits as its factorization.

3575621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510810.

The product of its digits is 6300, while the sum is 29.

The square root of 3575621 is about 1890.9312520555. The cubic root of 3575621 is about 152.9151422591.

The spelling of 3575621 in words is "three million, five hundred seventy-five thousand, six hundred twenty-one".