542445621 has 8 divisors (see below), whose sum is σ = 740901504. Its totient is φ = 352810080.

The previous prime is 542445599. The next prime is 542445623. The reversal of 542445621 is 126544245.

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

It is not a de Polignac number, because 542445621 - 2⁶ = 542445557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542445623) 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, 2204941 + ... + 2205186.

It is an arithmetic number, because the mean of its divisors is an integer number (92612688).

Almost surely, 2^542445621 is an apocalyptic number.

It is an amenable number.

542445621 is a deficient number, since it is larger than the sum of its proper divisors (198455883).

542445621 is a wasteful number, since it uses less digits than its factorization.

542445621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4410171.

The product of its digits is 38400, while the sum is 33.

The square root of 542445621 is about 23290.4620177445. The cubic root of 542445621 is about 815.5527739041.

Adding to 542445621 its reverse (126544245), we get a palindrome (668989866).

The spelling of 542445621 in words is "five hundred forty-two million, four hundred forty-five thousand, six hundred twenty-one".