3722561 has 4 divisors (see below), whose sum is σ = 3792852. Its totient is φ = 3652272.

The previous prime is 3722549. The next prime is 3722567. The reversal of 3722561 is 1652273.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3010225 + 712336 = 1735^2 + 844^2 .

It is a cyclic number.

It is not a de Polignac number, because 3722561 - 2¹⁰ = 3721537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3722561.

It is not an unprimeable number, because it can be changed into a prime (3722567) 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, 35066 + ... + 35171.

It is an arithmetic number, because the mean of its divisors is an integer number (948213).

Almost surely, 2^3722561 is an apocalyptic number.

It is an amenable number.

3722561 is a deficient number, since it is larger than the sum of its proper divisors (70291).

3722561 is an equidigital number, since it uses as much as digits as its factorization.

3722561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70290.

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

The square root of 3722561 is about 1929.3939462951. The cubic root of 3722561 is about 154.9817668459.

The spelling of 3722561 in words is "three million, seven hundred twenty-two thousand, five hundred sixty-one".