542172420 has 96 divisors (see below), whose sum is σ = 1690362240. Its totient is φ = 144270720.

The previous prime is 542172383. The next prime is 542172427. The reversal of 542172420 is 24271245.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (542172427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 372414 + ... + 373866.

It is an arithmetic number, because the mean of its divisors is an integer number (17607940).

Almost surely, 2^542172420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 542172420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845181120).

542172420 is an abundant number, since it is smaller than the sum of its proper divisors (1148189820).

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

542172420 is a wasteful number, since it uses less digits than its factorization.

542172420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162 (or 2154 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 542172420 is about 23284.5961957686. The cubic root of 542172420 is about 815.4158340641.

It can be divided in two parts, 5421 and 72420, that added together give a square (77841 = 279²).

The spelling of 542172420 in words is "five hundred forty-two million, one hundred seventy-two thousand, four hundred twenty".