542526251 has 4 divisors (see below), whose sum is σ = 543735000. Its totient is φ = 541317504.

The previous prime is 542526233. The next prime is 542526293. The reversal of 542526251 is 152625245.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542526251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542526211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 603701 + ... + 604598.

It is an arithmetic number, because the mean of its divisors is an integer number (135933750).

Almost surely, 2^542526251 is an apocalyptic number.

542526251 is a deficient number, since it is larger than the sum of its proper divisors (1208749).

542526251 is a wasteful number, since it uses less digits than its factorization.

542526251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208748.

The product of its digits is 24000, while the sum is 32.

The square root of 542526251 is about 23292.1929195170. The cubic root of 542526251 is about 815.5931802661.

The spelling of 542526251 in words is "five hundred forty-two million, five hundred twenty-six thousand, two hundred fifty-one".