42721182 has 80 divisors (see below), whose sum is σ = 110781792. Its totient is φ = 12052800.

The previous prime is 42721181. The next prime is 42721183. The reversal of 42721182 is 28112724.

It is an interprime number because it is at equal distance from previous prime (42721181) and next prime (42721183).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42721181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 114348 + ... + 114720.

Almost surely, 2^42721182 is an apocalyptic number.

42721182 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 42721182, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55390896).

42721182 is an abundant number, since it is smaller than the sum of its proper divisors (68060610).

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

42721182 is a wasteful number, since it uses less digits than its factorization.

42721182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 486 counting only the distinct ones).

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

The square root of 42721182 is about 6536.1442762534. The cubic root of 42721182 is about 349.5809460873.

It can be divided in two parts, 427 and 21182, that added together give a square (21609 = 147²).

The spelling of 42721182 in words is "forty-two million, seven hundred twenty-one thousand, one hundred eighty-two".