1630201421 has 8 divisors (see below), whose sum is σ = 1635564960. Its totient is φ = 1624847728.

The previous prime is 1630201399. The next prime is 1630201453. The reversal of 1630201421 is 1241020361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1630201421 - 2⁶ = 1630201357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1630201393 and 1630201402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630281421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458870 + ... + 462408.

It is an arithmetic number, because the mean of its divisors is an integer number (204445620).

Almost surely, 2^1630201421 is an apocalyptic number.

It is an amenable number.

1630201421 is a deficient number, since it is larger than the sum of its proper divisors (5363539).

1630201421 is an equidigital number, since it uses as much as digits as its factorization.

1630201421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4923.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1630201421 is about 40375.7528846212. The cubic root of 1630201421 is about 1176.9203957147.

Adding to 1630201421 its reverse (1241020361), we get a palindrome (2871221782).

The spelling of 1630201421 in words is "one billion, six hundred thirty million, two hundred one thousand, four hundred twenty-one".