1682503421 has 4 divisors (see below), whose sum is σ = 1682905500. Its totient is φ = 1682101344.

The previous prime is 1682503387. The next prime is 1682503423. The reversal of 1682503421 is 1243052861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1243052861 = 197 ⋅6309913.

It can be written as a sum of positive squares in 2 ways, for example, as 1094683396 + 587820025 = 33086^2 + 24245^2 .

It is a cyclic number.

It is not a de Polignac number, because 1682503421 - 2²² = 1678309117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1682503423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194696 + ... + 203153.

It is an arithmetic number, because the mean of its divisors is an integer number (420726375).

Almost surely, 2^1682503421 is an apocalyptic number.

It is an amenable number.

1682503421 is a deficient number, since it is larger than the sum of its proper divisors (402079).

1682503421 is an equidigital number, since it uses as much as digits as its factorization.

1682503421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402078.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1682503421 is about 41018.3303048771. The cubic root of 1682503421 is about 1189.3745792046.

The spelling of 1682503421 in words is "one billion, six hundred eighty-two million, five hundred three thousand, four hundred twenty-one".