249524542 has 4 divisors (see below), whose sum is σ = 374286816. Its totient is φ = 124762270.

The previous prime is 249524537. The next prime is 249524557. The reversal of 249524542 is 245425942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245425942 = 2 ⋅122712971.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62381134 + ... + 62381137.

It is an arithmetic number, because the mean of its divisors is an integer number (93571704).

Almost surely, 2^249524542 is an apocalyptic number.

249524542 is a deficient number, since it is larger than the sum of its proper divisors (124762274).

249524542 is a wasteful number, since it uses less digits than its factorization.

249524542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124762273.

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

The square root of 249524542 is about 15796.3458432639. The cubic root of 249524542 is about 629.5609118129.

The spelling of 249524542 in words is "two hundred forty-nine million, five hundred twenty-four thousand, five hundred forty-two".