1970805 has 32 divisors (see below), whose sum is σ = 3348864. Its totient is φ = 988416.

The previous prime is 1970791. The next prime is 1970809. The reversal of 1970805 is 5080791.

It is not a de Polignac number, because 1970805 - 2⁷ = 1970677 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 (1970809) 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 31 ways as a sum of consecutive naturals, for example, 29382 + ... + 29448.

It is an arithmetic number, because the mean of its divisors is an integer number (104652).

2^1970805 is an apocalyptic number.

1970805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1970805 is a deficient number, since it is larger than the sum of its proper divisors (1378059).

1970805 is a wasteful number, since it uses less digits than its factorization.

1970805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1970805 is about 1403.8536248484. The cubic root of 1970805 is about 125.3760409446.

It can be divided in two parts, 1970 and 805, that added together give a triangular number (2775 = T₇₄).

The spelling of 1970805 in words is "one million, nine hundred seventy thousand, eight hundred five".