1930561 has 4 divisors (see below), whose sum is σ = 1957824. Its totient is φ = 1903300.

The previous prime is 1930553. The next prime is 1930573. The reversal of 1930561 is 1650391.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1650391 = 557 ⋅2963.

It is a cyclic number.

It is not a de Polignac number, because 1930561 - 2³ = 1930553 is a prime.

It is a super-3 number, since 3×1930561³ = 21585983487333445443, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1930541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13525 + ... + 13666.

It is an arithmetic number, because the mean of its divisors is an integer number (489456).

2^1930561 is an apocalyptic number.

It is an amenable number.

1930561 is a deficient number, since it is larger than the sum of its proper divisors (27263).

1930561 is an equidigital number, since it uses as much as digits as its factorization.

1930561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27262.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 1930561 is about 1389.4462925928. The cubic root of 1930561 is about 124.5167689761.

The spelling of 1930561 in words is "one million, nine hundred thirty thousand, five hundred sixty-one".