542407861 has 2 divisors, whose sum is σ = 542407862. Its totient is φ = 542407860.

The previous prime is 542407847. The next prime is 542407867. The reversal of 542407861 is 168704245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 427703761 + 114704100 = 20681^2 + 10710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542407861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 542407861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542407867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271203930 + 271203931.

It is an arithmetic number, because the mean of its divisors is an integer number (271203931).

Almost surely, 2^542407861 is an apocalyptic number.

It is an amenable number.

542407861 is a deficient number, since it is larger than the sum of its proper divisors (1).

542407861 is an equidigital number, since it uses as much as digits as its factorization.

542407861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 542407861 is about 23289.6513713709. The cubic root of 542407861 is about 815.5338497416.

It can be divided in two parts, 54 and 2407861, that added together give a triangular number (2407915 = T₂₁₉₄).

The spelling of 542407861 in words is "five hundred forty-two million, four hundred seven thousand, eight hundred sixty-one".