42430121 has 12 divisors (see below), whose sum is σ = 44577456. Its totient is φ = 40363680.

The previous prime is 42430117. The next prime is 42430139. The reversal of 42430121 is 12103424.

It is not a de Polignac number, because 42430121 - 2² = 42430117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42430121.

It is not an unprimeable number, because it can be changed into a prime (42430111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71990 + ... + 72576.

It is an arithmetic number, because the mean of its divisors is an integer number (3714788).

Almost surely, 2^42430121 is an apocalyptic number.

42430121 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

42430121 is a deficient number, since it is larger than the sum of its proper divisors (2147335).

42430121 is an equidigital number, since it uses as much as digits as its factorization.

42430121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 42430121 is about 6513.8407257163. The cubic root of 42430121 is about 348.7852336118.

Adding to 42430121 its reverse (12103424), we get a palindrome (54533545).

The spelling of 42430121 in words is "forty-two million, four hundred thirty thousand, one hundred twenty-one".