542021421 has 8 divisors (see below), whose sum is σ = 765206784. Its totient is φ = 340091840.

The previous prime is 542021419. The next prime is 542021429. The reversal of 542021421 is 124120245.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 542021421 - 2¹ = 542021419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542021429) 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, 5313885 + ... + 5313986.

It is an arithmetic number, because the mean of its divisors is an integer number (95650848).

Almost surely, 2^542021421 is an apocalyptic number.

542021421 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

542021421 is a deficient number, since it is larger than the sum of its proper divisors (223185363).

542021421 is a wasteful number, since it uses less digits than its factorization.

542021421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10627891.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 542021421 is about 23281.3535044679. The cubic root of 542021421 is about 815.3401272696.

Adding to 542021421 its reverse (124120245), we get a palindrome (666141666).

The spelling of 542021421 in words is "five hundred forty-two million, twenty-one thousand, four hundred twenty-one".