86742261 has 12 divisors (see below), whose sum is σ = 125513388. Its totient is φ = 57727104.

The previous prime is 86742251. The next prime is 86742263. The reversal of 86742261 is 16224768.

It can be written as a sum of positive squares in 2 ways, for example, as 56700900 + 30041361 = 7530^2 + 5481^2 .

It is not a de Polignac number, because 86742261 - 2⁹ = 86741749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86742263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2790 + ... + 13463.

It is an arithmetic number, because the mean of its divisors is an integer number (10459449).

Almost surely, 2^86742261 is an apocalyptic number.

It is an amenable number.

86742261 is a deficient number, since it is larger than the sum of its proper divisors (38771127).

86742261 is a wasteful number, since it uses less digits than its factorization.

86742261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16852 (or 16849 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 86742261 is about 9313.5525445450. The cubic root of 86742261 is about 442.6667608562. Note that the first 3 decimals are identical.

The spelling of 86742261 in words is "eighty-six million, seven hundred forty-two thousand, two hundred sixty-one".