1968405 has 16 divisors (see below), whose sum is σ = 3167424. Its totient is φ = 1043840.

The previous prime is 1968403. The next prime is 1968427. The reversal of 1968405 is 5048691.

It is not a de Polignac number, because 1968405 - 2¹ = 1968403 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3982 + ... + 4448.

It is an arithmetic number, because the mean of its divisors is an integer number (197964).

2^1968405 is an apocalyptic number.

1968405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1968405 is a deficient number, since it is larger than the sum of its proper divisors (1199019).

1968405 is a wasteful number, since it uses less digits than its factorization.

1968405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1968405 is about 1402.9985744825. The cubic root of 1968405 is about 125.3251269399.

The spelling of 1968405 in words is "one million, nine hundred sixty-eight thousand, four hundred five".