42131740 has 96 divisors (see below), whose sum is σ = 109025280. Its totient is φ = 13353984.

The previous prime is 42131737. The next prime is 42131743. The reversal of 42131740 is 4713124.

It is an interprime number because it is at equal distance from previous prime (42131737) and next prime (42131743).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42131743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124852 + ... + 125188.

It is an arithmetic number, because the mean of its divisors is an integer number (1135680).

Almost surely, 2^42131740 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 42131740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54512640).

42131740 is an abundant number, since it is smaller than the sum of its proper divisors (66893540).

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

42131740 is a wasteful number, since it uses less digits than its factorization.

42131740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 42131740 is about 6490.8967023055. The cubic root of 42131740 is about 347.9657230519.

Adding to 42131740 its reverse (4713124), we get a palindrome (46844864).

The spelling of 42131740 in words is "forty-two million, one hundred thirty-one thousand, seven hundred forty".