1975561 has 8 divisors (see below), whose sum is σ = 2266880. Its totient is φ = 1686528.

The previous prime is 1975543. The next prime is 1975573. The reversal of 1975561 is 1655791.

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 1975561 - 2⁵ = 1975529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1975511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2185 + ... + 2953.

It is an arithmetic number, because the mean of its divisors is an integer number (283360).

2^1975561 is an apocalyptic number.

It is an amenable number.

1975561 is a deficient number, since it is larger than the sum of its proper divisors (291319).

1975561 is an equidigital number, since it uses as much as digits as its factorization.

1975561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143.

The product of its digits is 9450, while the sum is 34.

The square root of 1975561 is about 1405.5465129266. The cubic root of 1975561 is about 125.4768135448.

The spelling of 1975561 in words is "one million, nine hundred seventy-five thousand, five hundred sixty-one".