42156330 has 16 divisors (see below), whose sum is σ = 101175264. Its totient is φ = 11241680.

The previous prime is 42156313. The next prime is 42156347. The reversal of 42156330 is 3365124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42156313) and next prime (42156347).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42156330.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702576 + ... + 702635.

It is an arithmetic number, because the mean of its divisors is an integer number (6323454).

Almost surely, 2^42156330 is an apocalyptic number.

42156330 is an abundant number, since it is smaller than the sum of its proper divisors (59018934).

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

42156330 is a wasteful number, since it uses less digits than its factorization.

42156330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405221.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 42156330 is about 6492.7906172924. The cubic root of 42156330 is about 348.0334060942.

It can be divided in two parts, 42156 and 330, that added together give a triangular number (42486 = T₂₉₁).

The spelling of 42156330 in words is "forty-two million, one hundred fifty-six thousand, three hundred thirty".