42124451 has 2 divisors, whose sum is σ = 42124452. Its totient is φ = 42124450.

The previous prime is 42124403. The next prime is 42124457. The reversal of 42124451 is 15442124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42124451 - 2¹⁴ = 42108067 is a prime.

It is not a weakly prime, because it can be changed into another prime (42124457) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21062225 + 21062226.

It is an arithmetic number, because the mean of its divisors is an integer number (21062226).

Almost surely, 2^42124451 is an apocalyptic number.

42124451 is a deficient number, since it is larger than the sum of its proper divisors (1).

42124451 is an equidigital number, since it uses as much as digits as its factorization.

42124451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1280, while the sum is 23.

The square root of 42124451 is about 6490.3351993560. The cubic root of 42124451 is about 347.9456552959.

Adding to 42124451 its reverse (15442124), we get a palindrome (57566575).

The spelling of 42124451 in words is "forty-two million, one hundred twenty-four thousand, four hundred fifty-one".