42636487 has 2 divisors, whose sum is σ = 42636488. Its totient is φ = 42636486.

The previous prime is 42636463. The next prime is 42636491. The reversal of 42636487 is 78463624.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42636487 - 2⁷ = 42636359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42636427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21318243 + 21318244.

It is an arithmetic number, because the mean of its divisors is an integer number (21318244).

Almost surely, 2^42636487 is an apocalyptic number.

42636487 is a deficient number, since it is larger than the sum of its proper divisors (1).

42636487 is an equidigital number, since it uses as much as digits as its factorization.

42636487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 40.

The square root of 42636487 is about 6529.6620892662. The cubic root of 42636487 is about 349.3497778138.

The spelling of 42636487 in words is "forty-two million, six hundred thirty-six thousand, four hundred eighty-seven".