1935561 has 4 divisors (see below), whose sum is σ = 2580752. Its totient is φ = 1290372.

The previous prime is 1935541. The next prime is 1935589. The reversal of 1935561 is 1655391.

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 not a de Polignac number, because 1935561 - 2⁹ = 1935049 is a prime.

It is a D-number.

It is a Duffinian number.

1935561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1935541) 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, 322591 + ... + 322596.

It is an arithmetic number, because the mean of its divisors is an integer number (645188).

2^1935561 is an apocalyptic number.

It is an amenable number.

1935561 is a deficient number, since it is larger than the sum of its proper divisors (645191).

1935561 is an equidigital number, since it uses as much as digits as its factorization.

1935561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645190.

The product of its digits is 4050, while the sum is 30.

The square root of 1935561 is about 1391.2444069968. The cubic root of 1935561 is about 124.6241724953.

The spelling of 1935561 in words is "one million, nine hundred thirty-five thousand, five hundred sixty-one".