87251242 has 32 divisors (see below), whose sum is σ = 149954112. Its totient is φ = 37718784.

The previous prime is 87251237. The next prime is 87251251. The reversal of 87251242 is 24215278.

It is a happy number.

It is a super-2 number, since 2×87251242² = 15225558461085128, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 135373 + ... + 136015.

It is an arithmetic number, because the mean of its divisors is an integer number (4686066).

Almost surely, 2^87251242 is an apocalyptic number.

87251242 is a deficient number, since it is larger than the sum of its proper divisors (62702870).

87251242 is a wasteful number, since it uses less digits than its factorization.

87251242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982.

The product of its digits is 8960, while the sum is 31.

The square root of 87251242 is about 9340.8373286339. The cubic root of 87251242 is about 443.5308906517.

The spelling of 87251242 in words is "eighty-seven million, two hundred fifty-one thousand, two hundred forty-two".