420202542 has 16 divisors (see below), whose sum is σ = 840662352. Its totient is φ = 140024640.

The previous prime is 420202511. The next prime is 420202577. The reversal of 420202542 is 245202024.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15418 + ... + 32834.

It is an arithmetic number, because the mean of its divisors is an integer number (52541397).

Almost surely, 2^420202542 is an apocalyptic number.

420202542 is an abundant number, since it is smaller than the sum of its proper divisors (420459810).

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

420202542 is a wasteful number, since it uses less digits than its factorization.

420202542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21443.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 420202542 is about 20498.8424551241. The cubic root of 420202542 is about 749.0076012165.

Adding to 420202542 its reverse (245202024), we get a palindrome (665404566).

It can be divided in two parts, 4 and 20202542, that added together give a triangular number (20202546 = T₆₃₅₆).

The spelling of 420202542 in words is "four hundred twenty million, two hundred two thousand, five hundred forty-two".