4204001421 has 12 divisors (see below), whose sum is σ = 6073506972. Its totient is φ = 2802178176.

The previous prime is 4204001413. The next prime is 4204001429. The reversal of 4204001421 is 1241004024.

It is an interprime number because it is at equal distance from previous prime (4204001413) and next prime (4204001429).

It can be written as a sum of positive squares in 2 ways, for example, as 2833965225 + 1370036196 = 53235^2 + 37014^2 .

It is not a de Polignac number, because 4204001421 - 2³ = 4204001413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4204001394 and 4204001403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4204001429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18085 + ... + 93461.

It is an arithmetic number, because the mean of its divisors is an integer number (506125581).

Almost surely, 2^4204001421 is an apocalyptic number.

It is an amenable number.

4204001421 is a deficient number, since it is larger than the sum of its proper divisors (1869505551).

4204001421 is a wasteful number, since it uses less digits than its factorization.

4204001421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81580 (or 81577 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 4204001421 is about 64838.2712678245. The cubic root of 4204001421 is about 1613.9408649211.

Adding to 4204001421 its reverse (1241004024), we get a palindrome (5445005445).

It can be divided in two parts, 420400 and 1421, that added together give a triangular number (421821 = T₉₁₈).

The spelling of 4204001421 in words is "four billion, two hundred four million, one thousand, four hundred twenty-one".