3251561 has 6 divisors (see below), whose sum is σ = 3299562. Its totient is φ = 3204240.

The previous prime is 3251557. The next prime is 3251569. The reversal of 3251561 is 1651523.

It can be written as a sum of positive squares in only one way, i.e., 2496400 + 755161 = 1580^2 + 869^2 .

It is not a de Polignac number, because 3251561 - 2² = 3251557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3251569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5981 + ... + 6501.

It is an arithmetic number, because the mean of its divisors is an integer number (549927).

Almost surely, 2^3251561 is an apocalyptic number.

It is an amenable number.

3251561 is a deficient number, since it is larger than the sum of its proper divisors (48001).

3251561 is an frugal number, since it uses more digits than its factorization.

3251561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 600 counting only the distinct ones).

The product of its digits is 900, while the sum is 23.

The square root of 3251561 is about 1803.2085292611. The cubic root of 3251561 is about 148.1485147854.

The spelling of 3251561 in words is "three million, two hundred fifty-one thousand, five hundred sixty-one".