42071215 has 4 divisors (see below), whose sum is σ = 50485464. Its totient is φ = 33656968.

The previous prime is 42071201. The next prime is 42071231. The reversal of 42071215 is 51217024.

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 42071215 - 2¹⁹ = 41546927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4207117 + ... + 4207126.

It is an arithmetic number, because the mean of its divisors is an integer number (12621366).

Almost surely, 2^42071215 is an apocalyptic number.

42071215 is a deficient number, since it is larger than the sum of its proper divisors (8414249).

42071215 is an equidigital number, since it uses as much as digits as its factorization.

42071215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8414248.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 42071215 is about 6486.2327278629. The cubic root of 42071215 is about 347.7990180259.

Adding to 42071215 its reverse (51217024), we get a palindrome (93288239).

The spelling of 42071215 in words is "forty-two million, seventy-one thousand, two hundred fifteen".