1690612 has 36 divisors (see below), whose sum is σ = 3724000. Its totient is φ = 657360.

The previous prime is 1690609. The next prime is 1690621. The reversal of 1690612 is 2160961.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3139 + ... + 3637.

2^1690612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1690612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862000).

1690612 is an abundant number, since it is smaller than the sum of its proper divisors (2033388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1690612 is a wasteful number, since it uses less digits than its factorization.

1690612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1690612 is about 1300.2353633093. The cubic root of 1690612 is about 119.1282190234.

The spelling of 1690612 in words is "one million, six hundred ninety thousand, six hundred twelve".