42487915 has 4 divisors (see below), whose sum is σ = 50985504. Its totient is φ = 33990328.

The previous prime is 42487901. The next prime is 42487919. The reversal of 42487915 is 51978424.

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 42487915 - 2⁵ = 42487883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42487919) 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, 4248787 + ... + 4248796.

It is an arithmetic number, because the mean of its divisors is an integer number (12746376).

Almost surely, 2^42487915 is an apocalyptic number.

42487915 is a deficient number, since it is larger than the sum of its proper divisors (8497589).

42487915 is an equidigital number, since it uses as much as digits as its factorization.

42487915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8497588.

The product of its digits is 80640, while the sum is 40.

The square root of 42487915 is about 6518.2754621142. The cubic root of 42487915 is about 348.9435217020.

The spelling of 42487915 in words is "forty-two million, four hundred eighty-seven thousand, nine hundred fifteen".