74212530 has 128 divisors (see below), whose sum is σ = 212779008. Its totient is φ = 16215552.

The previous prime is 74212471. The next prime is 74212547. The reversal of 74212530 is 3521247.

It is a self number, because there is not a number n which added to its sum of digits gives 74212530.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 720459 + ... + 720561.

It is an arithmetic number, because the mean of its divisors is an integer number (1662336).

Almost surely, 2^74212530 is an apocalyptic number.

74212530 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 74212530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106389504).

74212530 is an abundant number, since it is smaller than the sum of its proper divisors (138566478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74212530 is a wasteful number, since it uses less digits than its factorization.

74212530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 74212530 is about 8614.6694655106. The cubic root of 74212530 is about 420.2351857397.

Adding to 74212530 its reverse (3521247), we get a palindrome (77733777).

The spelling of 74212530 in words is "seventy-four million, two hundred twelve thousand, five hundred thirty".