4201421620 has 48 divisors (see below), whose sum is σ = 9700927488. Its totient is φ = 1515749760.

The previous prime is 4201421617. The next prime is 4201421641. The reversal of 4201421620 is 261241024.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 4201421591 and 4201421600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47247 + ... + 103126.

It is an arithmetic number, because the mean of its divisors is an integer number (202102656).

Almost surely, 2^4201421620 is an apocalyptic number.

It is an amenable number.

4201421620 is an abundant number, since it is smaller than the sum of its proper divisors (5499505868).

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

4201421620 is a wasteful number, since it uses less digits than its factorization.

4201421620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150520 (or 150518 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 4201421620 is about 64818.3740925364. The cubic root of 4201421620 is about 1613.6106637778.

Adding to 4201421620 its reverse (261241024), we get a palindrome (4462662644).

The spelling of 4201421620 in words is "four billion, two hundred one million, four hundred twenty-one thousand, six hundred twenty".