542454661 has 4 divisors (see below), whose sum is σ = 619948192. Its totient is φ = 464961132.

The previous prime is 542454631. The next prime is 542454691. The reversal of 542454661 is 166454245.

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, and also an emirpimes, since its reverse is a distinct semiprime: 166454245 = 5 ⋅33290849.

It is an interprime number because it is at equal distance from previous prime (542454631) and next prime (542454691).

It is a cyclic number.

It is not a de Polignac number, because 542454661 - 2⁷ = 542454533 is a prime.

It is a super-3 number, since 3×542454661³ (a number of 27 digits) contains 333 as substring.

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 542454661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542454631) 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, 38746755 + ... + 38746768.

It is an arithmetic number, because the mean of its divisors is an integer number (154987048).

Almost surely, 2^542454661 is an apocalyptic number.

It is an amenable number.

542454661 is a deficient number, since it is larger than the sum of its proper divisors (77493531).

542454661 is an equidigital number, since it uses as much as digits as its factorization.

542454661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77493530.

The product of its digits is 115200, while the sum is 37.

The square root of 542454661 is about 23290.6560877962. The cubic root of 542454661 is about 815.5573043466.

The spelling of 542454661 in words is "five hundred forty-two million, four hundred fifty-four thousand, six hundred sixty-one".