1690424 has 16 divisors (see below), whose sum is σ = 3195720. Its totient is φ = 838240.

The previous prime is 1690421. The next prime is 1690427. The reversal of 1690424 is 4240961.

It is an interprime number because it is at equal distance from previous prime (1690421) and next prime (1690427).

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 1690393 and 1690402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690421) 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 3 ways as a sum of consecutive naturals, for example, 242 + ... + 1854.

2^1690424 is an apocalyptic number.

It is an amenable number.

1690424 is a deficient number, since it is larger than the sum of its proper divisors (1505296).

1690424 is a wasteful number, since it uses less digits than its factorization.

1690424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750 (or 1746 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1690424 is about 1300.1630666959. The cubic root of 1690424 is about 119.1238030810.

The spelling of 1690424 in words is "one million, six hundred ninety thousand, four hundred twenty-four".