74520135 has 16 divisors (see below), whose sum is σ = 132480480. Its totient is φ = 39744000.

The previous prime is 74520119. The next prime is 74520151. The reversal of 74520135 is 53102547.

It is a happy number.

74520135 is a `hidden beast` number, since 7 + 4 + 520 + 135 = 666.

It is an interprime number because it is at equal distance from previous prime (74520119) and next prime (74520151).

It is not a de Polignac number, because 74520135 - 2⁴ = 74520119 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 74520099 and 74520108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275866 + ... + 276135.

It is an arithmetic number, because the mean of its divisors is an integer number (8280030).

Almost surely, 2^74520135 is an apocalyptic number.

74520135 is a deficient number, since it is larger than the sum of its proper divisors (57960345).

74520135 is a wasteful number, since it uses less digits than its factorization.

74520135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552015 (or 552009 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 74520135 is about 8632.5045612499. The cubic root of 74520135 is about 420.8149991250.

The spelling of 74520135 in words is "seventy-four million, five hundred twenty thousand, one hundred thirty-five".