420144542 has 16 divisors (see below), whose sum is σ = 659286432. Its totient is φ = 200428800.

The previous prime is 420144541. The next prime is 420144551. The reversal of 420144542 is 245441024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420144541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7058 + ... + 29834.

It is an arithmetic number, because the mean of its divisors is an integer number (41205402).

Almost surely, 2^420144542 is an apocalyptic number.

420144542 is a deficient number, since it is larger than the sum of its proper divisors (239141890).

420144542 is a wasteful number, since it uses less digits than its factorization.

420144542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23203.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 420144542 is about 20497.4276922740. The cubic root of 420144542 is about 748.9731381220.

Adding to 420144542 its reverse (245441024), we get a palindrome (665585566).

The spelling of 420144542 in words is "four hundred twenty million, one hundred forty-four thousand, five hundred forty-two".