87621146 has 4 divisors (see below), whose sum is σ = 131431722. Its totient is φ = 43810572.

The previous prime is 87621133. The next prime is 87621161. The reversal of 87621146 is 64112678.

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

It can be written as a sum of positive squares in only one way, i.e., 74218225 + 13402921 = 8615^2 + 3661^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21905285 + ... + 21905288.

Almost surely, 2^87621146 is an apocalyptic number.

87621146 is a deficient number, since it is larger than the sum of its proper divisors (43810576).

87621146 is a wasteful number, since it uses less digits than its factorization.

87621146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43810575.

The product of its digits is 16128, while the sum is 35.

The square root of 87621146 is about 9360.6167531846. The cubic root of 87621146 is about 444.1567940403.

It can be divided in two parts, 876 and 21146, that added together give a palindrome (22022).

The spelling of 87621146 in words is "eighty-seven million, six hundred twenty-one thousand, one hundred forty-six".