87242851 has 4 divisors (see below), whose sum is σ = 91834600. Its totient is φ = 82651104.

The previous prime is 87242849. The next prime is 87242863. The reversal of 87242851 is 15824278.

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

It is a cyclic number.

It is not a de Polignac number, because 87242851 - 2¹ = 87242849 is a prime.

It is a super-2 number, since 2×87242851² = 15222630101216402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87242851.

It is not an unprimeable number, because it can be changed into a prime (87242821) 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, 2295846 + ... + 2295883.

It is an arithmetic number, because the mean of its divisors is an integer number (22958650).

Almost surely, 2^87242851 is an apocalyptic number.

87242851 is a deficient number, since it is larger than the sum of its proper divisors (4591749).

87242851 is a wasteful number, since it uses less digits than its factorization.

87242851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4591748.

The product of its digits is 35840, while the sum is 37.

The square root of 87242851 is about 9340.3881610991. The cubic root of 87242851 is about 443.5166719925.

The spelling of 87242851 in words is "eighty-seven million, two hundred forty-two thousand, eight hundred fifty-one".