542352721 has 4 divisors (see below), whose sum is σ = 551545200. Its totient is φ = 533160244.

The previous prime is 542352677. The next prime is 542352737. The reversal of 542352721 is 127253245.

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 542352721 - 2¹³ = 542344529 is a prime.

It is a super-2 number, since 2×542352721² = 588292947952207682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542352221) 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, 4596151 + ... + 4596268.

It is an arithmetic number, because the mean of its divisors is an integer number (137886300).

Almost surely, 2^542352721 is an apocalyptic number.

It is an amenable number.

542352721 is a deficient number, since it is larger than the sum of its proper divisors (9192479).

542352721 is an equidigital number, since it uses as much as digits as its factorization.

542352721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9192478.

The product of its digits is 16800, while the sum is 31.

The square root of 542352721 is about 23288.4675537056. The cubic root of 542352721 is about 815.5062136743.

The spelling of 542352721 in words is "five hundred forty-two million, three hundred fifty-two thousand, seven hundred twenty-one".