74121210 has 64 divisors (see below), whose sum is σ = 198581760. Its totient is φ = 19673280.

The previous prime is 74121193. The next prime is 74121211. The reversal of 74121210 is 1212147.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74121211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72664 + ... + 73676.

It is an arithmetic number, because the mean of its divisors is an integer number (3102840).

Almost surely, 2^74121210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74121210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99290880).

74121210 is an abundant number, since it is smaller than the sum of its proper divisors (124460550).

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

74121210 is a wasteful number, since it uses less digits than its factorization.

74121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 74121210 is about 8609.3675725921. The cubic root of 74121210 is about 420.0627457277.

Adding to 74121210 its reverse (1212147), we get a palindrome (75333357).

It can be divided in two parts, 74121 and 210, that multiplied together give a triangular number (15565410 = T₅₅₇₉).

The spelling of 74121210 in words is "seventy-four million, one hundred twenty-one thousand, two hundred ten".