42015487 has 2 divisors, whose sum is σ = 42015488. Its totient is φ = 42015486.

The previous prime is 42015481. The next prime is 42015527. The reversal of 42015487 is 78451024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42015487 - 2⁷ = 42015359 is a prime.

It is a super-2 number, since 2×42015487² = 3530602295694338, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42015481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21007743 + 21007744.

It is an arithmetic number, because the mean of its divisors is an integer number (21007744).

Almost surely, 2^42015487 is an apocalyptic number.

42015487 is a deficient number, since it is larger than the sum of its proper divisors (1).

42015487 is an equidigital number, since it uses as much as digits as its factorization.

42015487 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 42015487 is about 6481.9354362721. The cubic root of 42015487 is about 347.6453840198.

The spelling of 42015487 in words is "forty-two million, fifteen thousand, four hundred eighty-seven".