81470124 has 96 divisors (see below), whose sum is σ = 218579200. Its totient is φ = 26558928.

The previous prime is 81470111. The next prime is 81470131. The reversal of 81470124 is 42107418.

It is a super-2 number, since 2×81470124² = 13274762209150752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 586047 + ... + 586185.

Almost surely, 2^81470124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81470124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109289600).

81470124 is an abundant number, since it is smaller than the sum of its proper divisors (137109076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81470124 is a wasteful number, since it uses less digits than its factorization.

81470124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 81470124 is about 9026.0802123624. The cubic root of 81470124 is about 433.5103384706.

The spelling of 81470124 in words is "eighty-one million, four hundred seventy thousand, one hundred twenty-four".