1961866 has 8 divisors (see below), whose sum is σ = 3037824. Its totient is φ = 949260.

The previous prime is 1961863. The next prime is 1961873. The reversal of 1961866 is 6681691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1961863) 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, 15760 + ... + 15883.

It is an arithmetic number, because the mean of its divisors is an integer number (379728).

2^1961866 is an apocalyptic number.

1961866 is a deficient number, since it is larger than the sum of its proper divisors (1075958).

1961866 is a wasteful number, since it uses less digits than its factorization.

1961866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31676.

The product of its digits is 15552, while the sum is 37.

The square root of 1961866 is about 1400.6662700301. Note that the first 3 decimals coincide. The cubic root of 1961866 is about 125.1861971739.

The spelling of 1961866 in words is "one million, nine hundred sixty-one thousand, eight hundred sixty-six".