42645487 has 8 divisors (see below), whose sum is σ = 43243200. Its totient is φ = 42051744.

The previous prime is 42645467. The next prime is 42645509. The reversal of 42645487 is 78454624.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42645487 - 2²³ = 34256879 is a prime.

It is a super-2 number, since 2×42645487² = 3637275122934338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42645437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25233 + ... + 26869.

It is an arithmetic number, because the mean of its divisors is an integer number (5405400).

Almost surely, 2^42645487 is an apocalyptic number.

42645487 is a deficient number, since it is larger than the sum of its proper divisors (597713).

42645487 is a wasteful number, since it uses less digits than its factorization.

42645487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985.

The product of its digits is 215040, while the sum is 40.

The square root of 42645487 is about 6530.3512156698. The cubic root of 42645487 is about 349.3743571277.

The spelling of 42645487 in words is "forty-two million, six hundred forty-five thousand, four hundred eighty-seven".