420242100 has 36 divisors (see below), whose sum is σ = 1215901344. Its totient is φ = 112064480.

The previous prime is 420242099. The next prime is 420242117. The reversal of 420242100 is 1242024.

It is a super-2 number, since 2×420242100² = 353206845224820000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 420242100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 700104 + ... + 700703.

Almost surely, 2^420242100 is an apocalyptic number.

It is an amenable number.

420242100 is an abundant number, since it is smaller than the sum of its proper divisors (795659244).

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

420242100 is a wasteful number, since it uses less digits than its factorization.

420242100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400824 (or 1400817 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 420242100 is about 20499.8073161676. The cubic root of 420242100 is about 749.0311044164.

Adding to 420242100 its reverse (1242024), we get a palindrome (421484124).

The spelling of 420242100 in words is "four hundred twenty million, two hundred forty-two thousand, one hundred".