1642898 has 4 divisors (see below), whose sum is σ = 2464350. Its totient is φ = 821448.

The previous prime is 1642859. The next prime is 1642903. The reversal of 1642898 is 8982461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1014049 + 628849 = 1007^2 + 793^2 .

It is a super-2 number, since 2×1642898² = 5398227676808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410723 + ... + 410726.

2^1642898 is an apocalyptic number.

1642898 is a deficient number, since it is larger than the sum of its proper divisors (821452).

1642898 is an equidigital number, since it uses as much as digits as its factorization.

1642898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821451.

The product of its digits is 27648, while the sum is 38.

The square root of 1642898 is about 1281.7558269811. The cubic root of 1642898 is about 117.9967920223.

The spelling of 1642898 in words is "one million, six hundred forty-two thousand, eight hundred ninety-eight".