1962561 has 4 divisors (see below), whose sum is σ = 2616752. Its totient is φ = 1308372.

The previous prime is 1962557. The next prime is 1962577. The reversal of 1962561 is 1652691.

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 1962561 - 2² = 1962557 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1962551) 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, 327091 + ... + 327096.

It is an arithmetic number, because the mean of its divisors is an integer number (654188).

2^1962561 is an apocalyptic number.

It is an amenable number.

1962561 is a deficient number, since it is larger than the sum of its proper divisors (654191).

1962561 is an equidigital number, since it uses as much as digits as its factorization.

1962561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654190.

The product of its digits is 3240, while the sum is 30.

The square root of 1962561 is about 1400.9143442766. The cubic root of 1962561 is about 125.2009780228.

The spelling of 1962561 in words is "one million, nine hundred sixty-two thousand, five hundred sixty-one".