42051487 has 2 divisors, whose sum is σ = 42051488. Its totient is φ = 42051486.

The previous prime is 42051467. The next prime is 42051491. The reversal of 42051487 is 78415024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42051487 - 2¹⁵ = 42018719 is a prime.

It is a super-2 number, since 2×42051487² = 3536655117822338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42051467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21025743 + 21025744.

It is an arithmetic number, because the mean of its divisors is an integer number (21025744).

Almost surely, 2^42051487 is an apocalyptic number.

42051487 is a deficient number, since it is larger than the sum of its proper divisors (1).

42051487 is an equidigital number, since it uses as much as digits as its factorization.

42051487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 42051487 is about 6484.7117900490. The cubic root of 42051487 is about 347.7446463153.

The spelling of 42051487 in words is "forty-two million, fifty-one thousand, four hundred eighty-seven".