1961864 has 16 divisors (see below), whose sum is σ = 3872400. Its totient is φ = 929232.

The previous prime is 1961863. The next prime is 1961873. The reversal of 1961864 is 4681691.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1961863) 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 3 ways as a sum of consecutive naturals, for example, 6302 + ... + 6605.

It is an arithmetic number, because the mean of its divisors is an integer number (242025).

2^1961864 is an apocalyptic number.

It is an amenable number.

1961864 is a deficient number, since it is larger than the sum of its proper divisors (1910536).

1961864 is a wasteful number, since it uses less digits than its factorization.

1961864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12932 (or 12928 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 1961864 is about 1400.6655560840. The cubic root of 1961864 is about 125.1861546340.

The spelling of 1961864 in words is "one million, nine hundred sixty-one thousand, eight hundred sixty-four".