42101421 has 8 divisors (see below), whose sum is σ = 56381280. Its totient is φ = 27944592.

The previous prime is 42101419. The next prime is 42101467. The reversal of 42101421 is 12410124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42101421 - 2¹ = 42101419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42101421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42101471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29955 + ... + 31328.

It is an arithmetic number, because the mean of its divisors is an integer number (7047660).

Almost surely, 2^42101421 is an apocalyptic number.

It is an amenable number.

42101421 is a deficient number, since it is larger than the sum of its proper divisors (14279859).

42101421 is a wasteful number, since it uses less digits than its factorization.

42101421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61515.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 42101421 is about 6488.5607803272. The cubic root of 42101421 is about 347.8822348912.

Adding to 42101421 its reverse (12410124), we get a palindrome (54511545).

The spelling of 42101421 in words is "forty-two million, one hundred one thousand, four hundred twenty-one".