3145561 has 8 divisors (see below), whose sum is σ = 3412584. Its totient is φ = 2887680.

The previous prime is 3145559. The next prime is 3145573. The reversal of 3145561 is 1655413.

It can be written as a sum of positive squares in 4 ways, for example, as 47961 + 3097600 = 219^2 + 1760^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3145561 - 2¹ = 3145559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3145511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1560 + ... + 2953.

It is an arithmetic number, because the mean of its divisors is an integer number (426573).

Almost surely, 2^3145561 is an apocalyptic number.

It is an amenable number.

3145561 is a deficient number, since it is larger than the sum of its proper divisors (267023).

3145561 is a wasteful number, since it uses less digits than its factorization.

3145561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571.

The product of its digits is 1800, while the sum is 25.

The square root of 3145561 is about 1773.5729474707. The cubic root of 3145561 is about 146.5208301288.

The spelling of 3145561 in words is "three million, one hundred forty-five thousand, five hundred sixty-one".