542405521 has 16 divisors (see below), whose sum is σ = 666408960. Its totient is φ = 431073360.

The previous prime is 542405497. The next prime is 542405579. The reversal of 542405521 is 125504245.

It is a cyclic number.

It is not a de Polignac number, because 542405521 - 2⁵ = 542405489 is a prime.

It is a super-2 number, since 2×542405521² = 588407498422562882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 542405521.

It is not an unprimeable number, because it can be changed into a prime (542405221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37135 + ... + 49636.

It is an arithmetic number, because the mean of its divisors is an integer number (41650560).

Almost surely, 2^542405521 is an apocalyptic number.

It is an amenable number.

542405521 is a deficient number, since it is larger than the sum of its proper divisors (124003439).

542405521 is a wasteful number, since it uses less digits than its factorization.

542405521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86844.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 542405521 is about 23289.6011344119. The cubic root of 542405521 is about 815.5326769759.

Adding to 542405521 its reverse (125504245), we get a palindrome (667909766).

The spelling of 542405521 in words is "five hundred forty-two million, four hundred five thousand, five hundred twenty-one".