542649106 has 4 divisors (see below), whose sum is σ = 813973662. Its totient is φ = 271324552.

The previous prime is 542649071. The next prime is 542649119. The reversal of 542649106 is 601946245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 601946245 = 5 ⋅120389249.

It can be written as a sum of positive squares in only one way, i.e., 522533881 + 20115225 = 22859^2 + 4485^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135662275 + ... + 135662278.

Almost surely, 2^542649106 is an apocalyptic number.

542649106 is a deficient number, since it is larger than the sum of its proper divisors (271324556).

542649106 is a wasteful number, since it uses less digits than its factorization.

542649106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271324555.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 542649106 is about 23294.8300272829. The cubic root of 542649106 is about 815.6547392767.

The spelling of 542649106 in words is "five hundred forty-two million, six hundred forty-nine thousand, one hundred six".