42111401 has 2 divisors, whose sum is σ = 42111402. Its totient is φ = 42111400.

The previous prime is 42111379. The next prime is 42111403. The reversal of 42111401 is 10411124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32501401 + 9610000 = 5701^2 + 3100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42111401 is a prime.

Together with 42111403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42111403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21055700 + 21055701.

It is an arithmetic number, because the mean of its divisors is an integer number (21055701).

Almost surely, 2^42111401 is an apocalyptic number.

It is an amenable number.

42111401 is a deficient number, since it is larger than the sum of its proper divisors (1).

42111401 is an equidigital number, since it uses as much as digits as its factorization.

42111401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 42111401 is about 6489.3297804935. The cubic root of 42111401 is about 347.9097208234.

Adding to 42111401 its reverse (10411124), we get a palindrome (52522525).

The spelling of 42111401 in words is "forty-two million, one hundred eleven thousand, four hundred one".