74135215 has 64 divisors (see below), whose sum is σ = 120434688. Its totient is φ = 42393600.

The previous prime is 74135209. The next prime is 74135219. The reversal of 74135215 is 51253147.

It is a happy number.

It is not a de Polignac number, because 74135215 - 2⁵ = 74135183 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74135219) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 307495 + ... + 307735.

It is an arithmetic number, because the mean of its divisors is an integer number (1881792).

Almost surely, 2^74135215 is an apocalyptic number.

74135215 is a deficient number, since it is larger than the sum of its proper divisors (46299473).

74135215 is a wasteful number, since it uses less digits than its factorization.

74135215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328.

The product of its digits is 4200, while the sum is 28.

The square root of 74135215 is about 8610.1808924087. The cubic root of 74135215 is about 420.0892006307.

The spelling of 74135215 in words is "seventy-four million, one hundred thirty-five thousand, two hundred fifteen".