1690065 has 48 divisors (see below), whose sum is σ = 3302208. Its totient is φ = 824256.

The previous prime is 1690057. The next prime is 1690067. The reversal of 1690065 is 5600961.

It is not a de Polignac number, because 1690065 - 2³ = 1690057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1690067) 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 47 ways as a sum of consecutive naturals, for example, 15742 + ... + 15848.

It is an arithmetic number, because the mean of its divisors is an integer number (68796).

2^1690065 is an apocalyptic number.

1690065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1690065 is a deficient number, since it is larger than the sum of its proper divisors (1612143).

1690065 is a wasteful number, since it uses less digits than its factorization.

1690065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 1690065 is about 1300.0249997596. The cubic root of 1690065 is about 119.1153696006.

The spelling of 1690065 in words is "one million, six hundred ninety thousand, sixty-five".