84261861 has 12 divisors (see below), whose sum is σ = 121842240. Its totient is φ = 56114280.

The previous prime is 84261817. The next prime is 84261869. The reversal of 84261861 is 16816248.

It is not a de Polignac number, because 84261861 - 2⁶ = 84261797 is a prime.

It is a super-2 number, since 2×84261861² = 14200122438366642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84261869) 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, 4846 + ... + 13856.

It is an arithmetic number, because the mean of its divisors is an integer number (10153520).

Almost surely, 2^84261861 is an apocalyptic number.

It is an amenable number.

84261861 is a deficient number, since it is larger than the sum of its proper divisors (37580379).

84261861 is a wasteful number, since it uses less digits than its factorization.

84261861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10056 (or 10053 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 84261861 is about 9179.4259624445. The cubic root of 84261861 is about 438.4065312981.

The spelling of 84261861 in words is "eighty-four million, two hundred sixty-one thousand, eight hundred sixty-one".