42215612 has 6 divisors (see below), whose sum is σ = 73877328. Its totient is φ = 21107804.

The previous prime is 42215581. The next prime is 42215617. The reversal of 42215612 is 21651224.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42215617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5276948 + ... + 5276955.

It is an arithmetic number, because the mean of its divisors is an integer number (12312888).

Almost surely, 2^42215612 is an apocalyptic number.

It is an amenable number.

42215612 is a deficient number, since it is larger than the sum of its proper divisors (31661716).

42215612 is a wasteful number, since it uses less digits than its factorization.

42215612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10553907 (or 10553905 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 42215612 is about 6497.3542307619. The cubic root of 42215612 is about 348.1964694086.

Adding to 42215612 its reverse (21651224), we get a palindrome (63866836).

The spelling of 42215612 in words is "forty-two million, two hundred fifteen thousand, six hundred twelve".