42115487 has 4 divisors (see below), whose sum is σ = 43142736. Its totient is φ = 41088240.

The previous prime is 42115483. The next prime is 42115499. The reversal of 42115487 is 78451124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42115487 - 2² = 42115483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42115483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513563 + ... + 513644.

It is an arithmetic number, because the mean of its divisors is an integer number (10785684).

Almost surely, 2^42115487 is an apocalyptic number.

42115487 is a deficient number, since it is larger than the sum of its proper divisors (1027249).

42115487 is a wasteful number, since it uses less digits than its factorization.

42115487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027248.

The product of its digits is 8960, while the sum is 32.

The square root of 42115487 is about 6489.6445973566. The cubic root of 42115487 is about 347.9209728289.

The spelling of 42115487 in words is "forty-two million, one hundred fifteen thousand, four hundred eighty-seven".