42400134 has 96 divisors (see below), whose sum is σ = 112320000. Its totient is φ = 11290752.

The previous prime is 42400121. The next prime is 42400139. The reversal of 42400134 is 43100424.

42400134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42400139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 212967 + ... + 213165.

It is an arithmetic number, because the mean of its divisors is an integer number (1170000).

Almost surely, 2^42400134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42400134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56160000).

42400134 is an abundant number, since it is smaller than the sum of its proper divisors (69919866).

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

42400134 is a wasteful number, since it uses less digits than its factorization.

42400134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42400134 is about 6511.5385278750. The cubic root of 42400134 is about 348.7030475967.

Adding to 42400134 its reverse (43100424), we get a palindrome (85500558).

The spelling of 42400134 in words is "forty-two million, four hundred thousand, one hundred thirty-four".