86021506 has 4 divisors (see below), whose sum is σ = 129032262. Its totient is φ = 43010752.

The previous prime is 86021489. The next prime is 86021527. The reversal of 86021506 is 60512068.

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., 57836025 + 28185481 = 7605^2 + 5309^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21505375 + ... + 21505378.

Almost surely, 2^86021506 is an apocalyptic number.

86021506 is a deficient number, since it is larger than the sum of its proper divisors (43010756).

86021506 is a wasteful number, since it uses less digits than its factorization.

86021506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43010755.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 86021506 is about 9274.7779488244. Note that the first 3 decimals coincide. The cubic root of 86021506 is about 441.4372868175.

It can be divided in two parts, 860 and 21506, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 86021506 in words is "eighty-six million, twenty-one thousand, five hundred six".