42151657 has 2 divisors, whose sum is σ = 42151658. Its totient is φ = 42151656.

The previous prime is 42151639. The next prime is 42151667. The reversal of 42151657 is 75615124.

42151657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37589161 + 4562496 = 6131^2 + 2136^2 .

It is a cyclic number.

It is not a de Polignac number, because 42151657 - 2¹¹ = 42149609 is a prime.

It is not a weakly prime, because it can be changed into another prime (42151667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21075828 + 21075829.

It is an arithmetic number, because the mean of its divisors is an integer number (21075829).

Almost surely, 2^42151657 is an apocalyptic number.

It is an amenable number.

42151657 is a deficient number, since it is larger than the sum of its proper divisors (1).

42151657 is an equidigital number, since it uses as much as digits as its factorization.

42151657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 31.

The square root of 42151657 is about 6492.4307466464. The cubic root of 42151657 is about 348.0205458649.

The spelling of 42151657 in words is "forty-two million, one hundred fifty-one thousand, six hundred fifty-seven".