420225101 has 4 divisors (see below), whose sum is σ = 422901852. Its totient is φ = 417548352.

The previous prime is 420225097. The next prime is 420225107. The reversal of 420225101 is 101522024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 232562500 + 187662601 = 15250^2 + 13699^2 .

It is a cyclic number.

It is not a de Polignac number, because 420225101 - 2² = 420225097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420225101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420225107) 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, 1338140 + ... + 1338453.

It is an arithmetic number, because the mean of its divisors is an integer number (105725463).

Almost surely, 2^420225101 is an apocalyptic number.

It is an amenable number.

420225101 is a deficient number, since it is larger than the sum of its proper divisors (2676751).

420225101 is a wasteful number, since it uses less digits than its factorization.

420225101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676750.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 420225101 is about 20499.3926983216. The cubic root of 420225101 is about 749.0210047211.

Adding to 420225101 its reverse (101522024), we get a palindrome (521747125).

The spelling of 420225101 in words is "four hundred twenty million, two hundred twenty-five thousand, one hundred one".