42166740 has 96 divisors (see below), whose sum is σ = 147216384. Its totient is φ = 8760960.

The previous prime is 42166723. The next prime is 42166753. The reversal of 42166740 is 4766124.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 42166698 and 42166707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57 + ... + 9183.

It is an arithmetic number, because the mean of its divisors is an integer number (1533504).

Almost surely, 2^42166740 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 42166740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73608192).

42166740 is an abundant number, since it is smaller than the sum of its proper divisors (105049644).

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

42166740 is a wasteful number, since it uses less digits than its factorization.

42166740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9157 (or 9155 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 42166740 is about 6493.5922261873. The cubic root of 42166740 is about 348.0620512947.

It can be divided in two parts, 421 and 66740, that added together give a triangular number (67161 = T₃₆₆).

The spelling of 42166740 in words is "forty-two million, one hundred sixty-six thousand, seven hundred forty".