74121312 has 24 divisors (see below), whose sum is σ = 194568696. Its totient is φ = 24707072.

The previous prime is 74121301. The next prime is 74121319. The reversal of 74121312 is 21312147.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74121319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385953 + ... + 386144.

It is an arithmetic number, because the mean of its divisors is an integer number (8107029).

Almost surely, 2^74121312 is an apocalyptic number.

It is an amenable number.

74121312 is an abundant number, since it is smaller than the sum of its proper divisors (120447384).

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

74121312 is a wasteful number, since it uses less digits than its factorization.

74121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772110 (or 772102 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 74121312 is about 8609.3734963701. The cubic root of 74121312 is about 420.0629384138.

Adding to 74121312 its reverse (21312147), we get a palindrome (95433459).

The spelling of 74121312 in words is "seventy-four million, one hundred twenty-one thousand, three hundred twelve".