3526721 has 4 divisors (see below), whose sum is σ = 3847344. Its totient is φ = 3206100.

The previous prime is 3526711. The next prime is 3526741. The reversal of 3526721 is 1276253.

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 3526721 - 2⁶ = 3526657 is a prime.

It is a super-2 number, since 2×3526721² = 24875522023682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3526711) 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, 160295 + ... + 160316.

It is an arithmetic number, because the mean of its divisors is an integer number (961836).

Almost surely, 2^3526721 is an apocalyptic number.

It is an amenable number.

3526721 is a deficient number, since it is larger than the sum of its proper divisors (320623).

3526721 is a wasteful number, since it uses less digits than its factorization.

3526721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320622.

The product of its digits is 2520, while the sum is 26.

The square root of 3526721 is about 1877.9566022675. The cubic root of 3526721 is about 152.2148537073.

The spelling of 3526721 in words is "three million, five hundred twenty-six thousand, seven hundred twenty-one".