3126561 has 4 divisors (see below), whose sum is σ = 4168752. Its totient is φ = 2084372.

The previous prime is 3126559. The next prime is 3126653. The reversal of 3126561 is 1656213.

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 3126561 - 2¹ = 3126559 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3126511) 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, 521091 + ... + 521096.

It is an arithmetic number, because the mean of its divisors is an integer number (1042188).

Almost surely, 2^3126561 is an apocalyptic number.

It is an amenable number.

3126561 is a deficient number, since it is larger than the sum of its proper divisors (1042191).

3126561 is a wasteful number, since it uses less digits than its factorization.

3126561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042190.

The product of its digits is 1080, while the sum is 24.

The square root of 3126561 is about 1768.2084153176. The cubic root of 3126561 is about 146.2252262808.

The spelling of 3126561 in words is "three million, one hundred twenty-six thousand, five hundred sixty-one".