1698642 has 48 divisors (see below), whose sum is σ = 4200768. Its totient is φ = 491040.

The previous prime is 1698611. The next prime is 1698643. The reversal of 1698642 is 2468961.

1698642 is a `hidden beast` number, since 1 + 6 + 9 + 8 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1698597 and 1698606.

It is not an unprimeable number, because it can be changed into a prime (1698643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4368 + ... + 4740.

It is an arithmetic number, because the mean of its divisors is an integer number (87516).

2^1698642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1698642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2100384).

1698642 is an abundant number, since it is smaller than the sum of its proper divisors (2502126).

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

1698642 is a wasteful number, since it uses less digits than its factorization.

1698642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 412 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1698642 is about 1303.3196077709. The cubic root of 1698642 is about 119.3165313117.

The spelling of 1698642 in words is "one million, six hundred ninety-eight thousand, six hundred forty-two".