43121442 has 32 divisors (see below), whose sum is σ = 106146432. Its totient is φ = 11372544.

The previous prime is 43121423. The next prime is 43121459. The reversal of 43121442 is 24412134.

43121442 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 (21).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 38943 + ... + 40034.

It is an arithmetic number, because the mean of its divisors is an integer number (3317076).

Almost surely, 2^43121442 is an apocalyptic number.

43121442 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

43121442 is an abundant number, since it is smaller than the sum of its proper divisors (63024990).

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

43121442 is a wasteful number, since it uses less digits than its factorization.

43121442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79002.

The product of its digits is 768, while the sum is 21.

The square root of 43121442 is about 6566.6918612038. The cubic root of 43121442 is about 350.6693097303.

Adding to 43121442 its reverse (24412134), we get a palindrome (67533576).

The spelling of 43121442 in words is "forty-three million, one hundred twenty-one thousand, four hundred forty-two".