87621242 has 8 divisors (see below), whose sum is σ = 133283232. Its totient is φ = 43193500.

The previous prime is 87621241. The next prime is 87621257. The reversal of 87621242 is 24212678.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 87621199 and 87621208.

It is not an unprimeable number, because it can be changed into a prime (87621241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308384 + ... + 308667.

It is an arithmetic number, because the mean of its divisors is an integer number (16660404).

Almost surely, 2^87621242 is an apocalyptic number.

87621242 is a deficient number, since it is larger than the sum of its proper divisors (45661990).

87621242 is a wasteful number, since it uses less digits than its factorization.

87621242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617124.

The product of its digits is 10752, while the sum is 32.

The square root of 87621242 is about 9360.6218810504. The cubic root of 87621242 is about 444.1569562501.

The spelling of 87621242 in words is "eighty-seven million, six hundred twenty-one thousand, two hundred forty-two".