42054451 has 2 divisors, whose sum is σ = 42054452. Its totient is φ = 42054450.

The previous prime is 42054449. The next prime is 42054461. The reversal of 42054451 is 15445024.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42054451 - 2¹ = 42054449 is a prime.

It is a super-2 number, since 2×42054451² = 3537153697822802, which contains 22 as substring.

Together with 42054449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42054421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21027225 + 21027226.

It is an arithmetic number, because the mean of its divisors is an integer number (21027226).

Almost surely, 2^42054451 is an apocalyptic number.

42054451 is a deficient number, since it is larger than the sum of its proper divisors (1).

42054451 is an equidigital number, since it uses as much as digits as its factorization.

42054451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 42054451 is about 6484.9403235496. The cubic root of 42054451 is about 347.7528163864.

Adding to 42054451 its reverse (15445024), we get a palindrome (57499475).

The spelling of 42054451 in words is "forty-two million, fifty-four thousand, four hundred fifty-one".