74542842 has 80 divisors (see below), whose sum is σ = 185565600. Its totient is φ = 22174560.

The previous prime is 74542801. The next prime is 74542843. The reversal of 74542842 is 24824547.

74542842 is a `hidden beast` number, since 74 + 542 + 8 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 74542797 and 74542806.

It is not an unprimeable number, because it can be changed into a prime (74542843) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 104784 + ... + 105492.

It is an arithmetic number, because the mean of its divisors is an integer number (2319570).

Almost surely, 2^74542842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74542842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92782800).

74542842 is an abundant number, since it is smaller than the sum of its proper divisors (111022758).

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

74542842 is a wasteful number, since it uses less digits than its factorization.

74542842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 784 counting only the distinct ones).

The product of its digits is 71680, while the sum is 36.

The square root of 74542842 is about 8633.8196645517. The cubic root of 74542842 is about 420.8577369068.

It can be divided in two parts, 7454 and 2842, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 74542842 in words is "seventy-four million, five hundred forty-two thousand, eight hundred forty-two".