42042151 has 2 divisors, whose sum is σ = 42042152. Its totient is φ = 42042150.

The previous prime is 42042109. The next prime is 42042157. The reversal of 42042151 is 15124024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42042151 - 2⁷ = 42042023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42042157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21021075 + 21021076.

It is an arithmetic number, because the mean of its divisors is an integer number (21021076).

Almost surely, 2^42042151 is an apocalyptic number.

42042151 is a deficient number, since it is larger than the sum of its proper divisors (1).

42042151 is an equidigital number, since it uses as much as digits as its factorization.

42042151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 42042151 is about 6483.9919031412. The cubic root of 42042151 is about 347.7189097359.

Adding to 42042151 its reverse (15124024), we get a palindrome (57166175).

The spelling of 42042151 in words is "forty-two million, forty-two thousand, one hundred fifty-one".