42742856 has 64 divisors (see below), whose sum is σ = 92198400. Its totient is φ = 18413568.

The previous prime is 42742853. The next prime is 42742859. The reversal of 42742856 is 65824724.

It is an interprime number because it is at equal distance from previous prime (42742853) and next prime (42742859).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (42742853) 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, 191561 + ... + 191783.

It is an arithmetic number, because the mean of its divisors is an integer number (1440600).

Almost surely, 2^42742856 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 42742856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46099200).

42742856 is an abundant number, since it is smaller than the sum of its proper divisors (49455544).

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

42742856 is a wasteful number, since it uses less digits than its factorization.

42742856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 354 counting only the distinct ones).

The product of its digits is 107520, while the sum is 38.

The square root of 42742856 is about 6537.8020771510. The cubic root of 42742856 is about 349.6400544430.

The spelling of 42742856 in words is "forty-two million, seven hundred forty-two thousand, eight hundred fifty-six".