542621 has 4 divisors (see below), whose sum is σ = 571200. Its totient is φ = 514044.

The previous prime is 542603. The next prime is 542683. The reversal of 542621 is 126245.

It is a happy number.

542621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 542621 - 2⁶ = 542557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 542593 and 542602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14261 + ... + 14298.

It is an arithmetic number, because the mean of its divisors is an integer number (142800).

2⁵⁴²⁶²¹ is an apocalyptic number.

It is an amenable number.

542621 is a deficient number, since it is larger than the sum of its proper divisors (28579).

542621 is a wasteful number, since it uses less digits than its factorization.

542621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28578.

The product of its digits is 480, while the sum is 20.

The square root of 542621 is about 736.6281287054. The cubic root of 542621 is about 81.5640657010.

Adding to 542621 its reverse (126245), we get a palindrome (668866).

The spelling of 542621 in words is "five hundred forty-two thousand, six hundred twenty-one".