42100740 has 108 divisors (see below), whose sum is σ = 140443212. Its totient is φ = 10200960.

The previous prime is 42100733. The next prime is 42100753. The reversal of 42100740 is 4700124.

42100740 = T₁₅₁ + T₁₅₂ + ... + T₆₃₄.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21958596 + 20142144 = 4686^2 + 4488^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20814 + ... + 22746.

Almost surely, 2^42100740 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 42100740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70221606).

42100740 is an abundant number, since it is smaller than the sum of its proper divisors (98342472).

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

42100740 is a wasteful number, since it uses less digits than its factorization.

42100740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970 (or 1954 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 42100740 is about 6488.5083031464. The cubic root of 42100740 is about 347.8803591898.

Adding to 42100740 its reverse (4700124), we get a palindrome (46800864).

The spelling of 42100740 in words is "forty-two million, one hundred thousand, seven hundred forty".