81374124 has 48 divisors (see below), whose sum is σ = 206811360. Its totient is φ = 24752640.

The previous prime is 81374089. The next prime is 81374129. The reversal of 81374124 is 42147318.

It is a junction number, because it is equal to n+sod(n) for n = 81374091 and 81374100.

It is not an unprimeable number, because it can be changed into a prime (81374129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10954 + ... + 16814.

It is an arithmetic number, because the mean of its divisors is an integer number (4308570).

Almost surely, 2^81374124 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 81374124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103405680).

81374124 is an abundant number, since it is smaller than the sum of its proper divisors (125437236).

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

81374124 is a wasteful number, since it uses less digits than its factorization.

81374124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5970 (or 5968 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 81374124 is about 9020.7607218017. The cubic root of 81374124 is about 433.3399964787.

The spelling of 81374124 in words is "eighty-one million, three hundred seventy-four thousand, one hundred twenty-four".