3526421 has 4 divisors (see below), whose sum is σ = 3568992. Its totient is φ = 3483852.

The previous prime is 3526379. The next prime is 3526427. The reversal of 3526421 is 1246253.

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: 1246253 = 17 ⋅73309.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3526421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3526427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21161 + ... + 21326.

It is an arithmetic number, because the mean of its divisors is an integer number (892248).

Almost surely, 2^3526421 is an apocalyptic number.

It is an amenable number.

3526421 is a deficient number, since it is larger than the sum of its proper divisors (42571).

3526421 is an equidigital number, since it uses as much as digits as its factorization.

3526421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42570.

The product of its digits is 1440, while the sum is 23.

The square root of 3526421 is about 1877.8767265185. The cubic root of 3526421 is about 152.2105375402.

The spelling of 3526421 in words is "three million, five hundred twenty-six thousand, four hundred twenty-one".