1912561 has 8 divisors (see below), whose sum is σ = 2194304. Its totient is φ = 1632960.

The previous prime is 1912553. The next prime is 1912577. The reversal of 1912561 is 1652191.

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

It is not a de Polignac number, because 1912561 - 2³ = 1912553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1912531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2716 + ... + 3346.

It is an arithmetic number, because the mean of its divisors is an integer number (274288).

2^1912561 is an apocalyptic number.

It is an amenable number.

1912561 is a deficient number, since it is larger than the sum of its proper divisors (281743).

1912561 is an equidigital number, since it uses as much as digits as its factorization.

1912561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071.

The product of its digits is 540, while the sum is 25.

The square root of 1912561 is about 1382.9537230146. The cubic root of 1912561 is about 124.1285737138.

The spelling of 1912561 in words is "one million, nine hundred twelve thousand, five hundred sixty-one".