42050421 has 48 divisors (see below), whose sum is σ = 73382400. Its totient is φ = 23565168.

The previous prime is 42050387. The next prime is 42050423. The reversal of 42050421 is 12405024.

It is not a de Polignac number, because 42050421 - 2⁷ = 42050293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42050394 and 42050403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42050423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 100150 + ... + 100568.

It is an arithmetic number, because the mean of its divisors is an integer number (1528800).

Almost surely, 2^42050421 is an apocalyptic number.

It is an amenable number.

42050421 is a deficient number, since it is larger than the sum of its proper divisors (31331979).

42050421 is an equidigital number, since it uses as much as digits as its factorization.

42050421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 42050421 is about 6484.6295962067. The cubic root of 42050421 is about 347.7417078625.

Adding to 42050421 its reverse (12405024), we get a palindrome (54455445).

The spelling of 42050421 in words is "forty-two million, fifty thousand, four hundred twenty-one".