420025542 has 16 divisors (see below), whose sum is σ = 841969920. Its totient is φ = 139688712.

The previous prime is 420025537. The next prime is 420025549. The reversal of 420025542 is 245520024.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420025549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77098 + ... + 82365.

It is an arithmetic number, because the mean of its divisors is an integer number (52623120).

Almost surely, 2^420025542 is an apocalyptic number.

420025542 is an abundant number, since it is smaller than the sum of its proper divisors (421944378).

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

420025542 is a wasteful number, since it uses less digits than its factorization.

420025542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159907.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 420025542 is about 20494.5246834368. The cubic root of 420025542 is about 748.9024194283.

Adding to 420025542 its reverse (245520024), we get a palindrome (665545566).

The spelling of 420025542 in words is "four hundred twenty million, twenty-five thousand, five hundred forty-two".