1689412 has 6 divisors (see below), whose sum is σ = 2956478. Its totient is φ = 844704.

The previous prime is 1689397. The next prime is 1689431. The reversal of 1689412 is 2149861.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1218816 + 470596 = 1104^2 + 686^2 .

It is a super-2 number, since 2×1689412² = 5708225811488, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211173 + ... + 211180.

2^1689412 is an apocalyptic number.

It is an amenable number.

1689412 is a deficient number, since it is larger than the sum of its proper divisors (1267066).

1689412 is a wasteful number, since it uses less digits than its factorization.

1689412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422357 (or 422355 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 1689412 is about 1299.7738264791. The cubic root of 1689412 is about 119.1000265307.

The spelling of 1689412 in words is "one million, six hundred eighty-nine thousand, four hundred twelve".