420154542 has 24 divisors (see below), whose sum is σ = 915108480. Its totient is φ = 139317120.

The previous prime is 420154513. The next prime is 420154577. The reversal of 420154542 is 245451024.

420154542 is a `hidden beast` number, since 4 + 201 + 5 + 454 + 2 = 666.

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 11 ways as a sum of consecutive naturals, for example, 57667 + ... + 64542.

It is an arithmetic number, because the mean of its divisors is an integer number (38129520).

Almost surely, 2^420154542 is an apocalyptic number.

420154542 is an abundant number, since it is smaller than the sum of its proper divisors (494953938).

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

420154542 is a wasteful number, since it uses less digits than its factorization.

420154542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122408 (or 122405 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 420154542 is about 20497.6716238699. The cubic root of 420154542 is about 748.9790802611.

The spelling of 420154542 in words is "four hundred twenty million, one hundred fifty-four thousand, five hundred forty-two".