3531561 has 16 divisors (see below), whose sum is σ = 5191680. Its totient is φ = 2117520.

The previous prime is 3531559. The next prime is 3531569. The reversal of 3531561 is 1651353.

It is not a de Polignac number, because 3531561 - 2¹ = 3531559 is a prime.

It is a Curzon number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3531569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2880 + ... + 3918.

It is an arithmetic number, because the mean of its divisors is an integer number (324480).

Almost surely, 2^3531561 is an apocalyptic number.

It is an amenable number.

3531561 is a deficient number, since it is larger than the sum of its proper divisors (1660119).

3531561 is a wasteful number, since it uses less digits than its factorization.

3531561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156.

The product of its digits is 1350, while the sum is 24.

The square root of 3531561 is about 1879.2447951238. The cubic root of 3531561 is about 152.2844540649.

It can be divided in two parts, 3531 and 561, that multiplied together give a palindrome (1980891).

The spelling of 3531561 in words is "three million, five hundred thirty-one thousand, five hundred sixty-one".