84272481 has 20 divisors (see below), whose sum is σ = 127147284. Its totient is φ = 55620000.

The previous prime is 84272479. The next prime is 84272549. The reversal of 84272481 is 18427248.

It can be written as a sum of positive squares in 2 ways, for example, as 81000000 + 3272481 = 9000^2 + 1809^2 .

It is not a de Polignac number, because 84272481 - 2¹ = 84272479 is a prime.

It is a super-2 number, since 2×84272481² = 14203702107790722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84272401) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3031 + ... + 13331.

Almost surely, 2^84272481 is an apocalyptic number.

84272481 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

84272481 is a deficient number, since it is larger than the sum of its proper divisors (42874803).

84272481 is a wasteful number, since it uses less digits than its factorization.

84272481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10414 (or 10405 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 84272481 is about 9180.0044117636. The cubic root of 84272481 is about 438.4249488112.

It can be divided in two parts, 842724 and 81, that multiplied together give a square (68260644 = 8262²).

The spelling of 84272481 in words is "eighty-four million, two hundred seventy-two thousand, four hundred eighty-one".