542725561 has 8 divisors (see below), whose sum is σ = 656743680. Its totient is φ = 437828928.

The previous prime is 542725543. The next prime is 542725567. The reversal of 542725561 is 165527245.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542725561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 542725561.

It is not an unprimeable number, because it can be changed into a prime (542725567) 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, 2280241 + ... + 2280478.

It is an arithmetic number, because the mean of its divisors is an integer number (82092960).

Almost surely, 2^542725561 is an apocalyptic number.

It is an amenable number.

542725561 is a deficient number, since it is larger than the sum of its proper divisors (114018119).

542725561 is a wasteful number, since it uses less digits than its factorization.

542725561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4560743.

The product of its digits is 84000, while the sum is 37.

The square root of 542725561 is about 23296.4709988444. The cubic root of 542725561 is about 815.6930439281.

The spelling of 542725561 in words is "five hundred forty-two million, seven hundred twenty-five thousand, five hundred sixty-one".